# Focus Proof: Promise Yourself — Keep your word to yourself > Keep your word to yourself (iPhone/iPad app by Vinh Nguyen.) - Source: https://appshunter.io/ios/app/focus-proof-promise-yourself/id6794625162 (this page in markdown: same URL + `.md`) - Developer: [Vinh Nguyen](https://appshunter.io/developer/1802304933) - Category: Productivity, Lifestyle - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 26.0 · 12 MB - Languages: American English, Arabic, French (France), German (Germany), Hebrew, Hindi, Indonesian, Japanese, Korean, Malay and 9 more - Released: 2026-08-06 - Data updated: 2026-08-25 - User reviews in markdown: https://appshunter.io/ios/app/focus-proof-promise-yourself/id6794625162/reviews.md ## What is Focus Proof? Every focus app measures time. Focus Proof measures whether you did what you said you would. You don't just start a timer. First you write one line — "By the end of this, I will have _". Then you focus. And when the clock runs out, Focus Proof asks the only question that matters: did you? FOCUS RECEIPTS Every session prints a small, beautiful, collectible receipt — your intention, your focus time, the time of day, and a KEPT or MISSED stamp. Share the ones you're proud of. Keep them all. A missed receipt is still an honest one: you showed up and told the truth. FOLLOW-THROUGH RATE Not hours logged. Not sessions counted. The percentage of promises you kept — a number no other focus app owns, and the one you'll actually care about. Streaks count days you kept your word, not days you sat there. BUILT FOR THE PROMISE • Intention-first: no session starts without one • An immersive, candle-lit timer that stays out of your way • Wall-clock accurate — backgrounding never breaks a session • False starts (under 2 minutes) never count against you • Finish early when the thing is done — honesty cuts both ways PRIVATE BY ARCHITECTURE No account. No sign-in. No analytics of our own. No server. Your intentions and receipts never leave your device — we couldn't read them if we wanted to. The free version is supported by ads, which appear only after a finished session, never during one, and which Pro removes. FOCUS PROOF PRO — one price, forever The core experience is free and complete: unlimited sessions, the Classic receipt, your follow-through rate, streaks and 7-day stats. Pro removes the ads and adds six more receipt styles (Boarding Pass, Vintage Ticket, Vinyl Label, Polaroid, Blueprint, Telegram), your golden hours, the 30-day trend and session depth — for a single one-time purchase. No subscription, ever. An app about keeping promises doesn't rent them back to you. Make one small promise today. Keep it. Print the proof. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Focus Proof Pro | $0.99 | one-time | ## Version history (last 5 releases) ### 2.1.1 — 2026-08-23 • If you're enjoying the app, please leave a rating and a review — it genuinely helps. • If anything goes wrong while you're using it, email vinhnguyen30062002@gmail.com and we'll get an update out as fast as we can. ### 2.1 — 2026-08-18 • If you're enjoying the app, please leave a rating and a review — it genuinely helps. • If anything goes wrong while you're using it, email vinhnguyen30062002@gmail.com and we'll get an update out as fast as we can. ### 2.0 — 2026-08-16 • If you're enjoying the app, please leave a rating and a review — it genuinely helps. • If anything goes wrong while you're using it, email vinhnguyen30062002@gmail.com and we'll get an update out as fast as we can. ### 1.1 — 2026-08-13 Focus Proof 1.1 — write your intention, keep your word, print the receipt. ### 1.0 — 2026-08-06 No release notes. ## More apps by Vinh Nguyen - [Just'a Tabata: A Workout Timer](https://appshunter.io/ios/app/justa-tabata-a-workout-timer/id6789550194) - [Tilely: Photo Tile Puzzle](https://appshunter.io/ios/app/tilely-photo-tile-puzzle/id6790064872) - [Habit Switch: Swap Bad Habits](https://appshunter.io/ios/app/habit-switch-swap-bad-habits/id6791391862) - [OneQ: One Question a Day](https://appshunter.io/ios/app/oneq-one-question-a-day/id6792615124) - [Algorena - Learn Algorithms](https://appshunter.io/ios/app/algorena-learn-algorithms/id6794787482) All apps by Vinh Nguyen: https://appshunter.io/developer/1802304933 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*