Ernst Mulders

Web/app developer - Product Engineer - Side projects 🚁 @AirAssistApp (in Dutch @LifelinerApp) and ✈️ @WaterbomberApp

[Ernst Mulders @ernstmul]

Help saving lives with an app side project? Yes, yes that’s what I do!

Want to know how I got there? You can find the interview on @IndieHackers 🙌🏻

https://t.co/HnHzZM9Plq

[Ernst Mulders @ernstmul]

.@RevenueCat, any chance we’ll be getting the YouTube Play button but for MRR? 🙏

[Ernst Mulders @ernstmul]

@Erwin_AI Im not part of any of these communities. But the amount of clearly fake MRR screenshots I’m seeing on the for you tab is nauseating

[Ernst Mulders @ernstmul]

The first version of @AirAssistApp only refreshed aircraft positions every minute (when live positions was already the norm), yet still people paid for it.

I only fixed that after 2-3 months!

[Cap @cap]

this was Cap's first ever landing page

just ship your thing

[Ernst Mulders @ernstmul]

@adriaandotcom Validation at its finest 🙌

[Ernst Mulders @ernstmul]

Bug or feature 😅

[AirAssist @AirAssistApp]

An upcoming update will bring “altitude path colour”, and showing the path of the most recent flight (instead of “short path”).

But due to a bug I got the full route history of the past day. Not performant in the app, but looks cool 🤩

[Ernst Mulders @ernstmul]

@BhosalePratim Amsterdam? 👀

[Ernst Mulders @ernstmul]

@petecodes Early users (2021) of my app had the chance to buy Premium one time for €1.99, nowadays it’s €49.99. Has a ton more features now, but those early days users got rewarded for the support they gave me back then 🙌

[Ernst Mulders @ernstmul]

Trying VEO3 for some promo stuff for @AirAssistApp.
It for some reason changes my text as if I asked it to make typo’s and physics is hard 😂

[Ernst Mulders @ernstmul]

@jeiting It’s been broken for one app of mine for 2 years now (long before the RC app) would be nice if someone could check why 😅

[Ernst Mulders @ernstmul]

@SvenVD_Zee @RevenueCat @AirAssistApp Oh I mean, I still doesn’t work 🤷🏼‍♂️

[Ernst Mulders @ernstmul]

@SvenVD_Zee @RevenueCat @AirAssistApp Correction: after I changed the name of the app. The icon change was picked up flawlessly for Waterbomber

[Ernst Mulders @ernstmul]

@SvenVD_Zee @RevenueCat After I changed the icon for @AirAssistApp now nearly two years ago it went bust for some reason. Tried to get it fixed, but never got any reply from @RevenueCat. It’s only annoying for me, but still kinda disappointing 😅

[Ernst Mulders @ernstmul]

So awesome to see users that are on the app nearly from day one, an bought premium for €2,99 (one time), now switch to the new PRO features for €9,99/month.

The real supporters of @AirAssistApp ❤️

[Ernst Mulders @ernstmul]

Really excited about this one 🤩

[AirAssist @AirAssistApp]

Update 2025.3 is currently being tested! Hopefully the rollout to all users will start later this week 🌧️ 🕰️

[Ernst Mulders @ernstmul]

Testing iOS subscription in sandbox environment be like

@RevenueCat any thoughts how I can check if upgrading from one type of subscription (premium) to another (pro) works, without the user subscribing to both?

[Ernst Mulders @ernstmul]

@DittmannTorsten @itznotabug Congrats on the series A I guess? Or is raising not required for a .vc?

[Ernst Mulders @ernstmul]

@levelsio I have a full time job and 3 kids (5, 3 and 1). I get up at 5am to work on my side project (+50k MAU, and quite some MRR). Also rarely watch tv. And yes I still have time to workout. Won’t quit the day job till I’m 100% certain it will keep paying my bills!

[Ernst Mulders @ernstmul]

@petecodes At first I was like whoa whoa whoa 😨
Then I kept reading and it made more sense 😅

[Ernst Mulders @ernstmul]

@TweetsOfSumit Will depend if you ended up bringing the PS5?

[Ernst Mulders @ernstmul]

@Aufdecker Did you check @AirAssistApp app? Doesn’t give the exact reason why, but the flightpath might give some clues!