TrueFast vs Fasting Notebook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TrueFast
Track your intermittent fasting journey with a clean, ad-free interface. Monitor your progress, set personalized goals, and access educational content. Offers seamless integration with Apple Watch and Lock Screen widgets for easy access.
- Fasting timer with elapsed and remaining time
- Saved goals for common fasting plans
- Schedules and reminders
- History calendar, streaks, and badges
- Lock Screen widgets and Apple Watch support
- Fasting phase education
- Local-first data storage
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Your time. Your pace. TrueFast is a focused intermittent fasting timer for iPhone, iPad, and Apple Watch. Start a fast, follow your goal, and keep a clear record of your routine. No ads and no separate account required. Core fasting stays free • Start, stop, and edit fasts, with elapsed and remaining time. • Save goals for common fasting plans or choose your own duration. • Keep one active recurring schedule with reminders. • Review your fasting history, streaks, and badges. • Check progress with Home Screen and Lock Screen widgets, Live Activities, and Apple Watch. • Use light or dark appearance and explore fasting phase education. • Keep your records on your device and use the core timer offline. More flexibility with TrueFast Pro Flexible week planning Move or skip one day's fast without changing your recurring routine. Save adjustments for individual dates, let reminders follow the adjusted time, and check for overlapping fasts before saving. Private routine reviews Compare saved planned and recorded start times, and summarize your Easy, Fine, and Hard reflections. Reviews show dates, sample counts, and missing data. Calculations happen on your device, helping you understand your recorded routine without treating missing days as failures. Pro also includes: • Unlimited recurring schedules. • Optional iCloud sync across devices. • Weight tracking with Apple Health. • Advanced charts and CSV export. • Custom accent colors. The new planning and review features are included for existing Pro subscribers and lifetime owners. Core fasting remains free. Pro is available by subscription or as a one-time lifetime purchase; see current options and regional prices in the app. Your routine, your records TrueFast works locally by default. If you enable Pro sync, your records use your private iCloud database. Apple Health integration is optional. In Settings, you can send feedback through an email draft you review before sending; basic app and device diagnostics are optional and off by default. TrueFast is intended for adults. Fasting may not be appropriate for children, teens, pregnant or breastfeeding people, people with a history of eating disorders, or people with certain medical conditions. Consult a qualified healthcare professional before fasting. TrueFast does not provide medical advice, diagnosis, or treatment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://gettruefast.com/privacy-policy Support: https://gettruefast.com/support
Fasting Notebook
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Tap Start fast, and the timer counts your fasted time from that moment. Fasting Notebook is a timer and log for intermittent fasting. Set a goal of up to 7 days. When you pass the goal, the timer keeps counting until you end the fast. You do not need an account. Install it and start. ■ Undo a wrong tap • Started by mistake? Undo it right after you tap Start fast • Ate a while ago? Choose “Already started” to begin 15 minutes, 30 minutes, 1 hour or 2 hours back • During a fast, you can change the start time and the goal • Forgot to end a fast? Fix the end time afterward • Delete a fast you started by mistake with “Delete without logging” • Ended a fast too early? Tap Resume to keep counting the fast you just ended ■ From 12:12 to one meal a day, up to 7 days • Plans for 12:12, 14:10, 16:8, 18:6, 20:4, one meal a day (23:1), and 36, 48 and 72 hours • Set your own length, or time a fast without a goal • New to fasting? Answer three questions to see a recommended plan • Schedule fasts for every day, certain weekdays or every few days, with reminders for 5:2 low-calorie days • Goals longer than 24 hours ask for your confirmation before you start ■ See which hour you are on • A ring divided into stage ranges, with your elapsed time • Time left to your goal, and time past it • Each stage has reference information to read. It is not medical advice ■ Lock Screen and Home Screen widgets • The widget shows your elapsed time without opening the app • During a fast, a Live Activity appears on the Lock Screen and in the Dynamic Island. You can turn it off in Settings ■ Log and stats • A calendar of your fasts and your streak • Stats for 7, 30 and 90 days: average and longest fast, goal completion rate and mood • Log weight, body fat and muscle mass, with charts • Body photos collected by date, so you can compare them • Carry over the days and fasting hours you built in another app ■ Meals, exercise and water • Log breakfast, lunch, dinner and snacks with calories, carbs, protein, fat and sugars for each food, plus amount, photo and note • Foods you eat often are remembered, so you can add them with a tap • Log exercise from 10 types. Calories used are estimated from your weight and the intensity • Log water, tea, coffee and sparkling water, with a daily water goal you set • See calories eaten, estimated calories used in exercise and nutrient shares in Stats • Calories are estimates, worked out from the profile and weight you enter with a standard formula ■ Reminders • When you reach your goal, 1 hour before it, when a scheduled fast starts, and when you forgot to start • Reminders to drink water and to log your weight • “Send test notification” checks that reminders reach you ■ No account. Your logs stay on your device. • Your fasts, meals, weight and photos are saved only on this device • Save everything, photos included, to a backup file and restore it on a new device. You can also export CSV for spreadsheets • Health app sync works only when you turn it on. Weight, water and exercise are exchanged with Apple Health, and permission is requested when you turn it on • Choose a 12-hour or 24-hour clock • App lock with a PIN or Face ID • There are no in-app purchases ■ Please read Stage descriptions are for reference and are not medical advice. Calories are estimates. If you are pregnant or nursing, have a medical condition or take medication, talk to your doctor before you start. The app is not meant for people under 18. If you feel dizzy or notice anything unusual, stop right away. Use it at your own pace. Contact: fasting@hyunjins.co.kr
Screenshots
Verdict
The clearest difference is in-app purchases: Fasting Notebook at none against TrueFast's 6. Fasting Notebook also leads on update cadence (daily vs every 6 days) and iOS requirement (15.5 vs 18.0). On price, ads 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. TrueFast sells 6 in-app purchases, starting at $2.99 per month. Fasting Notebook asks for nothing beyond the download.
TrueFast ships an update every 6 days, Fasting Notebook daily. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.
| Parameter | TrueFast | Fasting Notebook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 days | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 6 MB | 29 MB |
| Age rating | 17+ | 12+ |
| Developer | Evan Mattson | Hyunjin Jang |
In-app purchases
TrueFast
- TrueFast Pro Monthly$2.991 Month
- TrueFast Pro Yearly$19.991 Year
- Buy Us a Coffee$1.99
- Power the Fast$4.99
- Super Supporter$9.99
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- TrueFast Pro (Lifetime)$29.99
Fasting Notebook
No in-app purchases









