I made IdroFlow—a privacy-first hydration tracker for iPhone & Apple Watch with no ads and no guilt.
Hey everyone,
Like a lot of people here, I’ve been trying to build better daily habits (specifically staying hydrated), but almost every app in the health category feels incredibly loud. They are packed with notification spam, intrusive banner ads, extreme data tracking, and constant upsells.
I wanted the exact opposite: an app that gets out of your way.
So I spent the last few months building IdroFlow. It’s an iOS and Apple Watch hydration tracker built with a strict design constraint: logging a drink should be faster than ignoring a notification.
To do that without the noise, I focused entirely on native Apple ecosystem surfaces:
• One-tap Home Screen and Lock Screen widgets
• A companion Apple Watch app for quick wrist logging (the wrist is always closer than the phone)
• Hands-free Siri & App Shortcuts ("Log water with IdroFlow")
• Full iCloud and HealthKit sync
The privacy model is completely plain: No ads or aggressive trackers. Your health data stays entirely yours on your device and iCloud.
I’m about to release version 1.5, which introduces custom drinks (because a coffee or morning smoothie shouldn't count the same as pure water) and a quiet, guilt-free Analysis tab to spot weekly consistency trends rather than penalizing you for a bad afternoon.
The app is free, with IdroFlow Plus as a bonus (1,99/month, 7,99/year, 19,99 lifetime)
Since I am a solo indie developer, I don't have a massive marketing budget. I was thinking of running a tiny €100 Apple Search Ads experiment just to figure out what keywords people use when they want a "calm" habit tracker rather than a noisy one.
I would love to get some brutally honest feedback from this community.
I'd love to hear your thoughts in the comments!