Fasty vs 16
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fasty
This app helps users track intermittent fasting by monitoring fasting days and eating periods. It supports weight tracking in both pounds and kilograms and does not collect user data.
- Intermittent fasting tracking
- Weight tracking
- Fasting day monitoring
- Eating period logging
- Pound and kilogram support
- No data collection
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Fasty: the Fasting Tracker helps you track your weight, the days you fast, and when you eat on non-fasting days (intermittent fasting). Fasty doesn't track any of your data, is free, and supports pounds and kilograms.
16
This app helps users adopt intermittent fasting by tracking fasting periods, weight changes, and daily water intake. It integrates with Apple Health to import exercise data, providing insights into daily activity alongside dietary progress.
- Fasting tracking
- Weight tracking
- Water intake tracking
- HealthKit integration
- Fasting progress visualization
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Now more and more people are trying the new dietary method of intermittent fasting. As a dietary method, intermittent fasting has rapidly become popular worldwide in recent years, attracting a large number of people to try it. This dietary pattern is not only considered an effective weight loss method, but also believed to bring benefits to physical and mental health. What is intermittent fasting? Intermittent fasting is a dietary pattern that cycles between fasting and a normal diet. It doesn't specify which foods you should eat, but when you should eat them. Intermittent fasting does not involve tracking calories. This dietary approach is mainly achieved by limiting the daily eating time, rather than by accurately calculating the amount of calories or protein, fat, and carbohydrates consumed. HealthKit: We import your exercise data from Apple Health to help you understand your daily exercise routine. The intermittent fasting app will provide you with: Fasting Tracking: Intermittent fasting is tracked according to your fasting plan, and you can check your fasting progress at any time to see which stage of intermittent fasting your body is currently in. Weight Tracking: Record the trend of weight changes through daily weight check ins. Drinking water tracking: Set daily drinking water goals and track completion status. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Fasty at none against 16's 3. Fasty also leads on review sentiment (100% vs 78%). 16's advantage is update cadence (every 9 days vs every 16 months) and ratings volume (54 vs 7). On price, rating, 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. 16 sells 3 in-app purchases, starting at $1.99 per month. Fasty asks for nothing beyond the download.
Fasty holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: 16 has 54 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 100% of Fasty's written reviews are positive against 78% of 16's.
Fasty ships an update every 16 months, 16 every 9 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | Fasty | 16 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (7 ratings) — better | 4.7 (54 ratings) |
| Positive reviews | 100.0% of reviews — better | 77.8% of reviews |
| Number of ratings | 7 | 54 — better |
| Update frequency | Every 16 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Forest and the Trees, LLC | Heze Refresh Network Technology Co., Ltd |
Customer experience
Fasty
16
In-app purchases
Fasty
No in-app purchases
16
- Pro (Monthly)$1.991 Month
- Pro (Yearly)$8.991 Year
- Pro (Lifetime)$17.99








