iF vs DoFast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iF
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iF - InterFast makes intermittent fasting simple and helps you adopt a healthy lifestyle. Intermittent fasting brings several health benefits and has helped thousands of people lose weight and be healthier. With iF - InterFast, you can easily add your meals, drinks and activities to monitor your daily calorie count. Performance is saved and can be viewed in the stats. Monitor and record your weight at regular intervals and track your progress. iF -InterFast also calculates your TDEE which serves as a guide in monitoring your calorie intake and can read your active calorie burnt from Health App.
DoFast
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Smart intermittent fasting tracker. Choose 16:8, 18:6, 20:4, OMAD or custom protocols. - Multiple fasting protocols - Metabolic phase tracking - Timer with eating window - Calendar heatmap - Statistics and streaks - Dark mode - English and Hebrew Not medical advice. Consult your doctor. Use at your own risk.
Screenshots
Verdict
The clearest difference is in-app purchases: DoFast at none against iF's 12. DoFast also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, 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. iF sells 12 one-off in-app purchases. DoFast asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.
| Parameter | iF | DoFast |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Hans Babylone | Igor Lenderman |
In-app purchases
iF
- Mediterranean Chicken$0.99
- Fish Fillet in Tomatoes Garlic$0.99
- Grilled Shrimp with Salsa$0.99
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- Salmon with Mango Salsa$0.99
- Guacamole On Toast With Salad$0.99
- Peppered Beef With Asparagus$0.99
- Cauliflower Pizza$0.99
- Chocolate Cupcake$0.99
- Keto Pancake$0.99
- Intermediate level$2.99
- Experienced Level$3.99
- Personalized & Statistics$4.99
DoFast
No in-app purchases
