FastBodyClock vs Solstice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FastBodyClock
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.
- Intermittent fasting tracking
- Health monitoring
- Goal achievement support
- Simple interface
- Beautiful design
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FastBodyClock is your all-in-one intermittent fasting companion. Track your fasts, monitor your health, and reach your goals with a simple, beautiful interface.
Solstice
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.
- 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
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Track your fasts with elegance, biological precision, and zero clutter. Solstice is an intermittent fasting tracker built with a clean, battery-efficient design. Track your circadian rhythms, monitor real-time metabolic stages (fat burning, autophagy, deep ketosis), and build consistent fasting habits without subscriptions or paywalls. KEY FEATURES: • Elegant Circular Timer: Real-time progress with tactile dial adjustments. • 5 Metabolic Fasting Stages: Understand when your body enters Blood Sugar Reset, Glycogen Depletion, Fat Burning, Autophagy, and Deep Ketosis. • Flexible Fasting Protocols: Choose 16:8, 18:6, 20:4 (Warrior), 14:10, 23:1 (OMAD), or customize your own. • Visual Calendar Heatmap: Glanceable monthly consistency view with active streak counters. • Solar & Dark Mode Themes: Deep midnight OLED dark mode and radiant solar accents. • 100% Private & On-Device: No account required, no ads, no trackers. Your health data stays on your device. DISCLAIMER: Solstice provides general wellness tracking and is not a substitute for professional medical advice. Always consult a healthcare provider before beginning any fasting routine.
Screenshots
Verdict
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.
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. 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.
| Parameter | FastBodyClock | Solstice |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 17.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 4 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Daumia LLC | James Grusy |
Customer experience
FastBodyClock
Solstice
In-app purchases
FastBodyClock
No in-app purchases
Solstice
No in-app purchases
