Rhythm vs 16
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rhythm
This app simplifies intermittent fasting with a daily tracker. It supports various fasting schedules, from beginner-friendly to advanced, and helps users monitor their progress over time. Get notifications when your fast is complete.
- Daily fasting tracker
- Flexible schedule support
- Weekly progress tracking
- Customizable fasting goals
- One-click start
- Progress monitoring
- Completion notifications
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Rhythm is a simple intermittent fasting tracker for people who want a clean fast timer without the bloat. No account. No ads. Just a focused way to start a fast, stay on track, and review your history when you're done. Choose any fasting goal from 7 to 24 hours, including popular rhythms like 16:8 and 18:6. Start a fast in seconds, follow your progress live, and switch between countdown and elapsed timer views. Rhythm helps you stay consistent with: - flexible fasting goals - multiple fasts in the same day - reminder and completion notifications - editable fasting history - weekly progress insights If you want a fasting app that feels simple, respectful, and easy to trust, Rhythm gives you the essentials and gets out of your way.
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: Rhythm at none against 16's 3. Rhythm also leads on ratings volume (454 vs 54) and review sentiment (89% vs 78%). 16's advantage is update cadence (every 9 days vs every 13 months) and iOS requirement (15.0 vs 17.6). 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. Rhythm asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Rhythm against 4.7 for 16. That said, the two scores are not equally well evidenced: Rhythm has 454 ratings behind it against 54, so its average is the more settled of the two. Written reviews are what separate them: 89% of Rhythm's written reviews are positive against 78% of 16's.
Rhythm ships an update every 13 months, 16 every 9 days. The most recent releases landed on August 10, 2026 and September 19, 2026 respectively.
| Parameter | Rhythm | 16 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (454 ratings) | 4.7 (54 ratings) — better |
| Positive reviews | 88.5% of reviews — better | 77.8% of reviews |
| Number of ratings | 454 — better | 54 |
| Update frequency | Every 13 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 12+ | 4+ |
| Developer | Bijan Cronin | Heze Refresh Network Technology Co., Ltd |
Customer experience
Rhythm
16
Bugs and requests
Rhythm
Reported bugs
2 issues- Can't add past fasts
- Inconsistent weekly progress tracking
Requested features
5 requests- Ability to track longer fasts (e.g., 48-72 hours)
- Option to view fasting history beyond the past week
- Customizable notifications and reminders
- Integration with health/fitness tracking apps
- Weight tracking and progress visualization
16
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Rhythm
No in-app purchases
16
- Pro (Monthly)$1.991 Month
- Pro (Yearly)$8.991 Year
- Pro (Lifetime)$17.99
