Proof vs Tairoku
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Proof
This app helps you monitor your weight and BMI to build consistent healthy habits. It offers quick logging, automatic BMI calculation, and progress visualization. Designed for simplicity and privacy, it supports your health journey.
- Weight logging
- Automatic BMI calculation
- BMI category display
- Progress charts
- Weight history
- Daily reminders
- Private by design
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Stay on top of your health with Proof. Proof is a simple weight and BMI tracker designed to help you build healthy habits through consistent check-ins. Whether you’re losing weight, maintaining your health or simply keeping track of your BMI, Proof makes it quick and effortless. FEATURES • Log your weight in seconds • Automatic BMI calculation • BMI category • Progress charts • Weight history • Daily reminders • Private by design Simple. Fast. Built for consistency. Terms of use can be found here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Tairoku
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A weight log only helps if you keep it. Tairoku is a weight-only tracker built so that today's entry is done by nudging yesterday's number — nothing to type. ■ Two taps, starting from last time The record sheet opens with your previous weight already in place. Move it with −0.1 / +0.1 for whatever changed, and save. ■ Weight makes sense as a line, not a number Day-to-day readings swing with food and water. View 7 days, 30 days, 90 days, or a year as a line chart with a 7-day moving average on top, so one morning's number doesn't decide how you feel. ■ How far is the goal Set a goal weight and a progress ring shows how much of the distance you have covered since you started. Reaching it gets a short celebration. ■ Days kept, and the basics See your recording streak, the change in your weekly average, and the lowest and highest weight for the period. Add your height and BMI appears alongside them. Body fat percentage is optional. ■ Check it and log it from the Home Screen Home Screen and Lock Screen widgets show your latest weight, the change since last time, a 7-day trend, and goal progress. Tap one to open the record sheet. A daily reminder is there too — and it works fine left off. ■ Apple Health, CSV export, and history calendar Apple Health sync lets you turn reading and writing on or off separately; both are off by default. Browse past entries on a monthly calendar, and export your records as a CSV file. Units: kg and lb. Works in Dark Mode and on iPad. ■ Records stay on your device No account and no sign-in. Weight, body fat, and notes are stored only on the device and are not sent anywhere. The network is used to show ads and to send anonymous usage and crash data that help improve the app. We do not collect information that identifies you personally.
Screenshots
Verdict
The clearest difference is in-app purchases: Tairoku at none against Proof's 2. Proof's advantage is ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Proof sells 2 in-app purchases, starting at $4.99 per month. Tairoku asks for nothing beyond the download.
| Parameter | Proof | Tairoku |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Every 4 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 36 MB | 9 MB |
| Age rating | 17+ | 4+ |
| Developer | Edward Sutcliffe | Daisuke Minami |
In-app purchases
Proof
- Proof Monthly$4.991 Month
- proof_yearly3 Days trial$9.991 Year
Tairoku
No in-app purchases









