# Rhythm vs 16

Rhythm and 16 both sit at 4.7 stars, but that hides the real split: 89% of Rhythm's written reviews are positive against 50% of 16's. Rhythm also leads on in-app purchases (none vs 3) and ratings volume (458 vs 64). 16's advantage is update cadence (every 5 days vs every 13 months). On price, rating, ads and device support there is nothing between them.

Both are free to download. 16 sells 3 in-app purchases, starting at $6.99 per 7 days. Rhythm asks for nothing beyond the download.

16 holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Rhythm has 458 ratings behind it against 64, so its average is the more settled of the two. Written reviews complicate that: 89% of Rhythm's written reviews are positive against 50% of 16's, so the app with the better star average is not the one people write more warmly about.

Rhythm ships an update every 13 months, 16 every 5 days. Both last shipped on October 23, 2026.

## The numbers

| Metric | Rhythm | 16 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (458 ratings)](https://appshunter.io/ios/app/rhythm-fasting-tracker/id1377199450/reviews) | **[4.9 (64 ratings)](https://appshunter.io/ios/app/168intermittent-fasting-app/id6478310864/reviews)** |
| Number of ratings | **458** | 64 |
| Positive reviews | **88.6% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 71 MB |
| Requires iOS | 17.6 | **16.2** |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Bijan Cronin](https://appshunter.io/developer/1377199449) | [AV PRO GROUP LTD](https://appshunter.io/developer/1699441355) |

## What reviewers say

### Rhythm

[App page](https://appshunter.io/ios/app/rhythm-fasting-tracker/id1377199450)

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.

**Highlights:** Daily fasting tracker, Flexible schedule support, Weekly progress tracking, Customizable fasting goals, One-click start, Progress monitoring, Completion notifications

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💎 Simple and easy to use
- 🆓 Free app with no ads or subscriptions
- ⏱️ Straightforward fasting timer
- 📊 Tracks fasting progress
- 🔍 Allows editing of start/end times

**What reviewers complain about**

- ⏰ Can't track fasts longer than 24 hours
- 📅 Limited history view (only past week)
- 🔔 Lacks customizable notifications/reminders

**Reported bugs**

- Can't add past fasts
- Inconsistent weekly progress tracking

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/168intermittent-fasting-app/id6478310864)

This app guides users through intermittent fasting with personalized plans and convenient tracking tools. It helps manage weight, boost energy, and improve overall health with customizable reminders.

**Highlights:** Personalized intermittent fasting plans, Fasting and eating window tracking, Customizable start/end reminders, AI Calorie Tracker, Weight loss support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $6.99 | per 7 days |
| Premium Yearly Plan | $39.99 | per year |
| Premium Yearly Plan | $49.99 | per year |


## Frequently asked questions

### Is Rhythm free?

Rhythm is free to download, with no in-app purchases.

### Is 16 free?

16 is free to download, with in-app purchases available.

### Which has better reviews, Rhythm or 16?

16 is rated higher. Rhythm averages 4.7 out of 5 from 458 ratings, while 16 averages 4.9 from 64 ratings.

### Do Rhythm or 16 have ads?

Neither Rhythm nor 16 shows ads.

### Which is updated more often, Rhythm or 16?

Rhythm ships an update every 13 months, and 16 every 5 days. Most recently, Rhythm was updated on October 23, 2026 and 16 on October 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*