For a while I couldn't sleep properly. I'd lie in bed for hours and blame stress. Then I wondered if it was my afternoon coffee. The problem: I never remembered how many cups of coffee or tea I had in a day. I also had no idea if I was drinking enough water. I searched for an app that shows both in one place, with a simple answer to "is it too late for another coffee?". I couldn't find one that felt simple, so I built it. It's called SipBalance, and it's live on Google Play today. What it does: - Log water, coffee, tea and other drinks - Shows an estimate of how much caffeine is still active in your body - Suggests a last-coffee time based on your bedtime - "What if" preview: see how one more drink changes your bedtime level before you log it - Forgot to log? You can backdate a drink - 7-day, 30-day and yearly habit insights - Free, no account, your data stays on your phone Honest limits: - Android only, English UI for now - Caffeine numbers are estimates based on a standard decay model, not medical advice About how I built it: I'm a solo developer from Bangladesh. I built it mostly with Google AI Studio and tested everything by hand on a real phone, because the AI kept saying "done" when things weren't. Google also made me run a 14-day closed test before approving production, which taught me a lot. I'd love honest feedback: Is the "what if I drink now?" preview useful, or confusing? What would make you open an app like this every day? What's missing? https://play.google.com/store/apps/details?id=com.aistudio.sipbalance.trkmv Thanks for reading!   submitted by   /u/techvolatile7 [link]   [comments]