# FastBodyClock vs Solstice

The clearest difference is update cadence: Solstice at every 9 days against FastBodyClock's every 3 weeks. On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for FastBodyClock against 5.0 for Solstice. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

FastBodyClock ships an update every 3 weeks, Solstice every 9 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | FastBodyClock | Solstice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/fastbodyclock/id6766765008/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/solstice-intermittent-fasting/id6802910075/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free | Free |
| Size | 4 MB | 5 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Daumia LLC](https://appshunter.io/developer/1896323244) | [James Grusy](https://appshunter.io/developer/6802910077) |

## What reviewers say

### FastBodyClock

[App page](https://appshunter.io/ios/app/fastbodyclock/id6766765008)

This app helps you manage intermittent fasting and track your health metrics. It offers a user-friendly interface to monitor your fasting periods and progress towards your wellness objectives.

**Highlights:** Intermittent fasting tracking, Health monitoring, Goal achievement support, Simple interface, Beautiful design

**In-app purchases:** none


### Solstice

[App page](https://appshunter.io/ios/app/solstice-intermittent-fasting/id6802910075)

Track your intermittent fasting with biological precision and a clean, clutter-free design. Monitor metabolic stages and build consistent habits without subscriptions or paywalls. Offers elegant timers, visual progress tracking, and privacy-focused, on-device data storage.

**Highlights:** Elegant circular timer with tactile adjustments, 5 metabolic fasting stages tracking, Flexible and customizable fasting protocols, Visual calendar heatmap for consistency, Solar and dark mode themes, 100% private and on-device data

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

**In-app purchases:** none


## Frequently asked questions

### Is FastBodyClock free?

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

### Is Solstice free?

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

### Which has better reviews, FastBodyClock or Solstice?

FastBodyClock and Solstice are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do FastBodyClock or Solstice have ads?

Neither FastBodyClock nor Solstice shows ads.

### Which is updated more often, FastBodyClock or Solstice?

FastBodyClock ships an update every 3 weeks, and Solstice every 9 days. Most recently, FastBodyClock was updated on October 31, 2026 and Solstice on October 31, 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.*