![Image 1 — [App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)](https://preview.redd.it/vujvi81o3pdh1.png?width=1080&format=png&auto=webp&s=ea2376e01d1470db8d26f111de5be9f6aec80216)
![Image 2 — [App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)](https://preview.redd.it/sfcq651o3pdh1.png?width=1080&format=png&auto=webp&s=a866e4c1ecce38a395ac25bc14c4ac2de2d8530f)
![Image 3 — [App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)](https://preview.redd.it/98qh9lzn3pdh1.png?width=1080&format=png&auto=webp&s=ea6ae343a9148abdd377c671fba12343eceea888)
![Image 4 — [App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)](https://preview.redd.it/ec7mynzn3pdh1.png?width=1080&format=png&auto=webp&s=ab01d1f512c37410ae46f8956576fe67ba8fe584)
![Image 5 — [App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)](https://preview.redd.it/ufvexnzn3pdh1.png?width=1080&format=png&auto=webp&s=d467df4d73933f336eedc0d09671c405b1a31487)
![Image 6 — [App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)](https://preview.redd.it/98uma61o3pdh1.png?width=1080&format=png&auto=webp&s=08ae2c99249f7758e0e18e9b044e73c0f6e0000b)
[App] [Promo] Bunku — offline, ad-free, ₹50-once attendance & bunk calculator (update: added backup/restore + timetable since launch)
Link :https://play.google.com/store/apps/details?id=com.jdevsappstudio.bunku
I'm a solo Android dev. This started as a personal itch: I wanted to know exactly how many lectures I could skip before my attendance dropped below the 75% my college enforces. Every existing app either made me type in semester totals, buried me in banner ads, or wanted a login for a thing that runs perfectly fine offline.
So I built Bunku. The whole idea is one number: how many classes can I safely bunk in this subject right now, and if I've already fallen behind, how many do I need to attend to climb back above my target. You add subjects, set a minimum % per subject (75, 80, whatever your college wants), and tap Present or Absent after each class. It does the maths — live percentage, safe-to-bunk count, colour-coded Safe / Warning / At Risk.
A few decisions I made on purpose:
- No ads, ever — free tier or paid. This was the whole reason I started, so putting ads in would've been hypocritical.
- Fully offline, no account. Your logs never leave the phone. No cloud, no sign-up.
- Pay once, not a subscription. Pro is a one-time ₹50 unlock (unlimited subjects, backup/restore to a file, CSV export, timetable, reminders). I hate renting software, so I won't make students rent this.
- Free tier is genuinely usable — 3 subjects, no time limit, not a trial that expires.
Slightly weird feature I'm oddly proud of: there are small pass-and-play games built in (2048, Tic-Tac-Toe, Air Hockey) for the gap between lectures. It fits the "college downtime" vibe and it was fun to build.
Tech stack: native Android (Kotlin), local storage only, no backend at all — which is why there's nothing to log into and no server bill to pay.
What I'd love feedback on:
- Is "how many can I bunk" clear enough as the core value, or does the games thing muddy it?
- The biggest competitor auto-imports attendance by reading a screenshot of your college portal (OCR). I'm debating whether that's worth building vs. keeping it dead simple. Curious what makers here would prioritise.