# Zing Performance vs Circadian Rhythm

The clearest difference is review sentiment: Circadian Rhythm at 100% against Zing Performance's 40%. Circadian Rhythm also leads on rating (4.6 vs 3.7) and update cadence (monthly vs every 4 months). Zing Performance's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.0). On price, ratings volume and ads there is nothing between them.

Both are free to download. Circadian Rhythm sells 3 in-app purchases, starting at $4.99 per month. Zing Performance asks for nothing beyond the download.

Circadian Rhythm holds the better App Store score, 4.6 against 3.7. Both are backed by a comparable volume of ratings — 9 and 11 respectively. Written reviews point the same way: 40% of Zing Performance's written reviews are positive against 100% of Circadian Rhythm's.

Zing Performance ships an update every 4 months, Circadian Rhythm monthly. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Zing Performance | Circadian Rhythm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/zing-performance/id1188238699/reviews) | **[4.6 (11 ratings)](https://appshunter.io/ios/app/circadian-rhythm-body-clock/id6737418117/reviews)** |
| Number of ratings | 9 | **11** |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 844 MB | 18 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Zing Performance Ltd](https://appshunter.io/developer/735387177) | [Joaquin Marticorena](https://appshunter.io/developer/1774135480) |

## What reviewers say

### Zing Performance

[App page](https://appshunter.io/ios/app/zing-performance/id1188238699)

This app uses neuroscience-backed exercises to enhance cognitive and physical performance. It offers personalized programs combining on-screen skill tests and physical activities to improve brain speed, memory, attention, and stress management.

**Highlights:** Personalized skill tests and physical activities, Neuroscience-based brain enhancement, Improves attention, memory, and coordination, Balances mind and body for stress management, Enhances spatial awareness, Accessible on the go

**In-app purchases:** none


### Circadian Rhythm

[App page](https://appshunter.io/ios/app/circadian-rhythm-body-clock/id6737418117)

Align your daily routines with your body's natural biological clock. Gain personalized insights to improve sleep, boost energy, and enhance focus by understanding your circadian rhythm. Optimize your day with alerts for hormone peaks and sunlight guidance.

**Highlights:** Circadian Rhythm Tracking, Sleep Insights & Trends, Hormone Peak Information, Daily Rhythm Alerts, Mood Tracking, Sunlight Guidance, Personalized Recommendations

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Circadian PRO | $4.99 | per month |
| Circadian PRO | $29.99 | per year |
| Lifetime Premium | $4.99 | one-time |


## Frequently asked questions

### Is Zing Performance free?

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

### Is Circadian Rhythm free?

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

### Which has better reviews, Zing Performance or Circadian Rhythm?

Circadian Rhythm is rated higher. Zing Performance averages 3.7 out of 5 from 9 ratings, while Circadian Rhythm averages 4.6 from 11 ratings.

### Do Zing Performance or Circadian Rhythm have ads?

Neither Zing Performance nor Circadian Rhythm shows ads.

### Which is updated more often, Zing Performance or Circadian Rhythm?

Zing Performance ships an update every 4 months, and Circadian Rhythm monthly. Most recently, Zing Performance was updated on November 2, 2026 and Circadian Rhythm on November 4, 2026.

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