RAPHAEL WICHMANN

App developer passionate
about creating great products.

My Own Apps

Splittr

I created this app just because I needed it.

I like to travel with friends and it was always a big mess after each trip to find out who owes whom how much. One paid for the flights, the other one booked the hotel. We ended up having complicated spreadsheets that helped us to come along with this problem.

With Splittr these problems are gone. You just enter an expense and define who paid and who benefited. Thats it. After the trip you can send a complete PDF Report to your friends.

My life became easier. And apparently the lifes of the 200,000+ people who downloaded Splittr too.

Like with all my own apps I was responsible for the strategy, conception, design, programming and marketing.

Watch a 50 second video of Splittr in action!
Stay updated and follow Splittr at Twitter! @splittr-app

This is big time saver!

After a monster trip with over 200 entangled expenses among 7 people, I spent 2 days sorting things out, accounting by hand, and preparing an expense report. Then I thought "there must be an easier way!" I discovered this app. In 15 minutes of data entry, this app produced the same results it took me days to get! I was proud of my arithmetic, but I'd rather save the time!

Invaluable!!!

Just toured Italy with 6 couples. Got home and what did everyone say was the best part, not the wine... Splittr was the best part of the trip. Wouldn't travel in a group without it ever again. Great app, thanks!!!!

Fabulous app

Wow! I've needed this for years! 7 college friends get together for a long weekend every year in a different city. We usually have to create a complicated spreadsheet at the end of the weekend to figure out who owes who how much. This worked PERFECTLY!! Bravo bravo!

Great app!

I love this app! It has totally revolutionized the way I travel with my family. I know this is probably an uncommon problem but when we travel my father insists on paying for everything for everyone which drives my poor mother crazy. Now we can all just let him produce his credit card and pay while we smile and enter everything into splittr. Then we even it up later. Thank you SO much splittr!!

So easy to use!!!

Highly recommend! Best cost split app after several similar apps trials. Never regret buying this app! Good job.

Perfect for girl friends weekend away

I found this in preparation for a weekend away with two friends from college. It was simple to use but allowed us to break everything down and in produced a report of who owed who what! It couldn't have made paying for everything easier! I highly recommend this app.

So convenient!

This app makes splitting trip expenses a breeze and takes all the stress out of evening up at the end. I've used this on several trips and the group is always grateful for this awesome tool.

Great app!

I love this app! It's very straightforward and easy to use. It's especially good when expenses are not the same for everyone in the group.

Such a useful app!

I have used this to calculate who owes what for a roadtrip and I LOVE it!! I was trying to use Excel and it was a pain! Glad I found this just a few days in. It'll also be used when figuring out paying for gifts and such with coworkers!

Awesome

First app I've ever written a review for. Super cool and very versatile. Used on a vacation with friends ... I'm the hero.

Best trip-reimbursement tool

Very convenient way to keep all your friends from hating each other after a trip! Does the math for you so you can focus on having a good time.

Best App

I can't say enough good things about this app. Made figuring cost sharing among three friends traveling in Italy a snap. Super easy to figure out, great reporting, does everything you need it to.

Must have for group trips

This is exactly what I needed for a road trip with my friends! Very slick nice app! Does everything VERY well.

Don't leave home without it

Travelled with friends to different countries thus different currencies. No problem as the app not only handled the splits of the costs but converted them to the home currency which made the final equalization payments a breeze once we got home. Brilliant.

Fantastic! Well worth the cost!

This is a fantastic app! I used it while away with a group of 9 women, and I can't think of a single scenario that it couldn't easily deal with. I can't make any recommendations for improvement because it's already completely functional and flexible. My friends all want the app now!

Excellent app. So useful.

Three of travel a lot together. We all take turns paying for various things. This app is perfect for keeping everything sorted out and is soooo easy to use. Great reports. Must have for multiple travellers!!!

Fantastic for Expense Splitting

Just got back from trip with two other friends. Put in all receipts, split costs between two or three people, equally or unequally depending on expense. It is so easy to use, love the equalization report - makes it so clear as to who owes whom what! If you travel with one or more other people you need this app!

IntelliDrink

IntelliDrink was born as a crazy idea on a party. After some research I found out that there was no sophisticated BAC calculator on the market. I was digging through scientific papers about the absorption and metabolism of alcohol in the human body and developed a complex algorithm based on the Widmark formula that takes time into consideration.

The feedback was overwhelming. I became compliments from all over the world. From doctors, scientists and from social services that used the app for educational purposes.

"We used IntelliDrink for obtaining estimated BAC in a research project for the purpose of calibrating sophisticated data analysis software for autonomous transdermal alcohol sensors."
Dr. Gary Rosen, Professor of Mathematics, University of Southern California (USC)

With over 400,000 downloads in the last 3 years IntelliDrink is also my most succesful app.

Like with all my own apps I was responsible for the strategy, conception, design, programming and marketing.

Featured by Buzzfeed, CNN, Mandatory and many more.
Stay updated and follow IntelliDrink at Twitter! @intellidrink

Useful and accurate app

As an expert in the field of BAC absorption and elimination, I am impressed by this app. It (from my limited use of the program) seems to produce reliable results. It is the only mobile device app I have reviewed that gives a BAC profile over time. Additionally, it is easy to use.

Wonderful and convenient.

This app is great! It allows me to see exactly what's going on with my bac %. It allows you to easily enter drinks and calculates everything out for you on a graph. It even allows for you to set a bac % alarm to let you know when you are under a set percentage. Great for knowing when it's safe to drive.

Very cool!

This is the only app I've ever paid for! When I'm out with friends trying new beers it's especially helpful because I can keep track of what I've had and have a better idea of when it's time to go home! Get it. It's worth it!

Accurate Compared to Alcosensor

Great app. I have been using it for a few weeks and tonight used it side by side with an Alcho-sensor device that was just calibrated. It was within .001! I was surprised. This thing is accurate. Good job.

Easy, fun, works great.

Way better (and easier to use) than expected. I can really, truly see this being a life-saver (or DUI).

Excellent App

Just purchased this app but it is really awesome and way advanced from any others I've looked at. Well worth the purchase price to track yourself and friends and to help you know where you BAC might be. Just remember to enter anything you drink at the time you first start to drink it.

So accurate!

I bought this app one week ago and have used it 4-5 times and it works perfect. Graphs are awesome, as well as my history of the night. I love it!

Brilliant.

Incredible. Absolutely wonderful and fascinating algorithm that takes into account absorption time.

Best ever

Greatest app ever. Saving lives one IPhone at a time.

Breathalyzer? What Breathalyzer?

My friends and I all serve and consume alcohol. Seeing how accurate IntelliDrink is, I've made it a part of every night I drink.

Best BAC app

I downloaded all of them, this was the best

Great app!

It seems really accurate and makes sense because it calculates over time! Plus you can track people separately. Recommend!

Best bac app

Fully customizable in letting u add, edit, and save any number of drinks to ur list, specifying default sizes, percent alcohol/strength, and typical drink duration, this app is simply amazing. Great that it factors in sex, age, and weight as well. None of the other bac/drink tracking apps out there even come close!

Nice App

As an engineer, I find this an excellent Ap with the capability to input most of the parameters needed to estimate BAC (short of using direct measurement). Nice!

On the money!

I have calibrated in conjunction with a breath-o-li-zor, the app follows most state law calibrations....After several trials, I recommend staying under .07 for breathing errors (eg, breathing to hard, to long, ext). Other than that, the ratios work great!

Great app

I bought other apps yet this is my favorite. I do not have to pick from lists of alcohol in fact I can edit them. I appreciate the function and the nice look. I have had NO PROBLEMS with the intellidrink and would give it my complete recommendation.

Best BAC estimator

This app is well designed, both visually and functionally. You can tell that a lot of work went into the formula and being able to save drink presets is a huge bonus.

The best

When I'm drunk, I use this as this "drive or not" decision, and more often than not, it feels dead on. The feature allowing multiple people to be tracked at once is a great party trick, and from my experience anyone with this app becomes a conversation starter. Great job!!

Great!!!

This is legit! This will literally save lives.

Arguably best app I've ever purchased

If you are reading reviews and considering purchasing this app stop and just buy it. It should be priced at $9.99 not $1.99.
It's great to make sure you're legal (we have calibrated intellidrink with a breathalyzer and it is THAT accurate) and even more fun to use as a competition with friends.

Fantastic! Genius!

Fantastic! This app is genius!

Nailed it

This is maybe the most well thought out app I've downloaded. Including angry birds

This one works

I've tried at least 10 apps that are supposed to help estimate BAC. This is the best one I've seen so far.

EggMaster

Do you like perfectly boiled eggs?
I do. And I've seen some timer apps in the App Store but none of them met my expecations.

I found some interesting formulas, improved these findings with my own tests and created an optimized algorithm to calculate the cooking time considering all relevant factors.

With EggMaster you can adjust your yolk consistency continously, you can cook different eggs at the same time and the coolest function is that the app learns by your feedback. EggMaster improves with every egg!

Its my newest app but still has a growing user base of 140,000+.

Like with all my apps I was responsible for the strategy, conception, design, programming and marketing.

Love this app!

I'm a pretty competent cook, but I never could boil and egg and have it exactly as I wanted it. And now I can! Never knew it was all to do with egg temperature and size. Genius app.

You wont regret!

The app its very complete, easy to use and have many great options you will love it! I never rate app but I thought this one deserved to be. Youll be surprise of how specific they are! with this app, your eggs will ALWAYS be perfect, no matter what, for real.

I love love love this app

My 2 children love their yolks runny, or they refuse to eat boiled eggs, with this app I get perfect yolks every time!...we all know eggs are an extremely nutritious food for growing children, so thank you for making it easier to feed healthy food to my kids

Brilliant

Amazing every time even for the eggstremely fussy!!!!!!!

Egg Master

Works perfectly for me, wouldn't boil an egg without it.

Brilliant App !!!

Cooked my eggs to the perfect consistency, was brilliantly easy to use, would HIGHLY recommend this app to anyone and everyone.

Egg timer

Look great. Works great. Absolutely cracking

Finally a PERFECT SOFT boiled egg!!

This app works! I just thought I'd give this a try & it turned out EXACTLY how I wanted it - boiled egg with a runny yolk! I've tried so many other methods to get a soft boiled egg & always ended up with either a hard boiled egg, or an undercooked egg where the whites were runny too. Awesome & simple app ~ thanks!

Great app

Never knew how much I needed this app until I downloaded it! Great for doing eggs and the settings make sure it turns out just how you like it!

Finally a perfect soft-boiled egg!

I love this app. Never could get my eggs perfect before but now they are the same every time! Wish I could get restaurants to use this when I order, but at least now I can tell them to boil a chilled egg for this many minutes. :)

Works Great

Works every time. Especially nice if you a guest who is picky about their eggs! Love the part of the app that helps you measure the diameter.

Perfect!!!

This app is amazing, I did exactly the time that it said to do my egg for. And it came out perfect just how I asked it too! I recommend everyone to get this app if your egg never comes out the way you want it too!

I LOVE THIS APP!!!

This is a simple app, but it does what you need it to do. Eggs turn out cooked to perfection every time!! Very useful little app in my opinion!

Perfect .......best app

I don't normally do many reviews but this app is worth recommending if u like yr eggs perfect every time .

Eggcellent

Great app, I was surprised at just how accurate it was. I like runny yolk but hate runny white. This app makes perfect eggs every time.

Absolutely fabulous

We use it every day - perfect eggs all the time. Family loves it and no more guess work!!!!!

iKicker

My first app on the App Store in 2010. Actually, it was just a test in the first place but became a simple and fun game in the end.

Just tap on the ball and try to keep it in the air. This is the concept of the game. Simple but apparently addicting.

I put a lot of effort in the three dimensional look of the ball and in the physics to create a realistic user experience.

The app was downloaded over 200,000 times. But its boom years are over and further development is currently not planned.

Like with all my apps I was responsible for the strategy, conception, design, programming and marketing.

Addictive!!!!

This game is so much fun and will get you to juggle even if you don't normally...

Great

Its not as simple as it looks download and give it a go you will find it hard to get past 100 let alone 300 (world record) 394 think but its awesome can be played with no internet as well so good on the move

Really cool

Awesome!! Constantly fighting with my kids to play!

Awesome.

This game is simpley one of the best games on the itouch. It is so good, especially for a soccer fanatic like me. 2Shmillion stars!

Its what they say it is

Simple and addicting. Two thumbs up!

Simple, fun, addicting!!!!

It's just what it promised!!!! Very addicting!

Good game

The continuous tapping is calming and the game overall is easy and addictive. I like the graphics a lot too

Addictive

Lovely and a very addictive game, one of the best apps Ive played

Addictive!!!!

Good pick, glad I did, have not been disappointed, in fact.......I'm addicted.. And I'm not even a child. Lol

5 stars

I think this game deserves 10 stars it's simple and affective

Mintage

This game is mintage it is the best football game I have ever played!

Client Work

WunderCar

WunderCar is a ride sharing platform comparable to Uber or Lyft.

I joined WunderCar as the first engineer and developed the foundation of the iOS app. My colleague Lars joined the team too and we launched the first version another 2 months later!

Even though the app is very easy to use, the technical background is quite complex due to the realtime server communication and heavy use of GPS and push notifications.

WunderCar is currently growing at a fast pace in eastern europe cities.

Pypeline

Pypeline is a super simple sales tracking tool!

We started Pypeline as a side project, developed an iOS app, a web app and our own backend. The project is currently in beta phase.

My part is the iOS App and I love the look and feel of the pype change animation and the visualization of the metrics.

Here you can get some more informations about Pypeline.

A-Dentifier

I developed this iPad app for Mercedes-Benz together with Jung von Matt advertising agency in Hamburg. The app was part of the Mercedes A-Class advertising campaign.

Beside the standard showroom like contents, the app made heavy use of OpenGL particle and video effects which were fun to create but also hard to optimize for iPad 1 devices.

Tasty Tunes

I created this game together with Fosbury Luther Lindbergh advertising agency for Al Capone. I also consulted the client regarding the concept of the app.

The idea was to create a game for direct marketing purposes which was distributed with the Apple enterprise program.

The app is a rhythm based game where you have to tap on one of the two records according to 3 different 90 seconds music tracks.

I created this app with the Cocos2D framework and included 3D animations and OpenGL particle effects for a really nice user experience.

Gigalocal

Gigalocal is a microjobbing platform which connects people offering and searching jobs based on geo locations.

I was asked to rebuild some parts of the app such as the main "Gig create" section.

Unfortunately this startup was not succesful and their service was shut down in 2012.

About Me

Hello!

I'm Raphael! I'm an app developer from Hamburg in Germany.

I love creating great products and I love to code. I'm currently focussed on iOS and Swift but I have a general interest and understanding of coding, design and UX combined with an entrepreneurial attitude.

Tell me more about you!

Ok! Although I wrote my first lines of code back in '86 on a C64, my professional career began in '99 with Flash and ActionScript.

Watch a short video of some of my ActionScript based projects I have created.

In this time I discovered my passion for programming and especially for creating great user experiences. And I fell in love with algorithms and data. Visualizing data is still one of my favorite fields.

But the best satisfaction for me is when all this tech knowledge is used to create something awesome for people who don't know much about tech. Creating easy to use products that just feel great and help people.

In 2010 I switched over to the iOS platform, which dramatically changed the possibilities of creating and distributing products to the people. I started creating my own apps and I still enjoy developing for the iOS platform.

Today I'm available for interesting freelance projects in the iOS space when I'm not working on my own apps.

Let's create something awesome together!

CONTACT ME