Simple Fasting App Review UK (2026)
One of the most popular intermittent fasting apps with strong ratings - but watch the subscription fine print
What is Simple?
Simple is an intermittent fasting app designed to make fasting accessible to beginners. It combines a fasting timer with personalised guidance, educational content about the science of fasting, and hydration tracking.
The app has grown significantly since launch and now includes AI-powered features and meal tracking alongside its core fasting functionality.
What Simple Offers
- Fasting Timer: Track fasting windows with countdown and notifications
- Personalised Plans: Fasting schedules based on your goals
- Educational Content: Science-based articles about fasting
- Hydration Tracking: Water intake reminders
- Meal Logging: Basic food diary functionality
- Ina AI Assistant: AI-powered fasting coach
- Progress Insights: Weight and fasting statistics
Simple Pricing UK
- Free Version: Basic fasting timer with limited features
- Annual: Around £34.99/year (best value)
- 6-Month: Around £29.99
- Monthly: Around £14.99/month
- Free Trial: 7-day trial available
The annual plan works out to under £3/month, making it one of the more affordable fasting apps when paid yearly.
The App Experience
Simple lives up to its name. The interface is clean and the fasting timer is straightforward to use. You select a fasting protocol, start the timer, and get notifications about your eating and fasting windows.
The educational content sets Simple apart from basic timers. Articles explain why fasting works, what happens during different fasting stages, and how to optimise your fasting schedule.
The AI assistant "Ina" can answer questions about fasting, though responses are sometimes generic. More useful are the personalised plan adjustments based on your progress.
Pros & Cons
Pros
- 4.3/5 Trustpilot rating
- Over 35,000 reviews
- Beginner-friendly design
- Strong educational content
- Multiple fasting protocols
- Affordable annual pricing
- AI assistant included
Cons
- Some billing complaints
- Limited free version
- AI responses can be generic
- Meal logging is basic
- Cancellation requires attention
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What Real Users Say
Simple has 4.3/5 on Trustpilot from 35,773 reviews - an impressively high rating for a fasting app with such volume.
"Finally an app that explains WHY fasting works rather than just giving you a timer. The educational content really helped me understand what my body was doing." - Trustpilot review
"Easy to use and the reminders keep me on track. Lost 2 stone in 4 months with 16:8 fasting using this app." - Trustpilot review
What positive reviewers say: Easy to use, helpful education, effective for weight loss, good value
What negative reviewers say: Some difficulty cancelling, charged after trial, limited free features
Who Simple Is For
Fasting Beginners
Educational content explains everything clearly.
Structure Seekers
Personalised plans remove the guesswork.
Science-Curious
Learn why fasting works, not just how.
Budget-Conscious
Annual plan is under £3/month.
Who Should Look Elsewhere
- Detailed calorie trackers: Meal logging is basic - dedicated apps do this better
- Free-only users: Most features require premium
- Advanced fasters: May find content too beginner-focused
The Bottom Line
Simple is one of the better intermittent fasting apps available. The 4.3 Trustpilot rating from over 35,000 reviews suggests most users find it genuinely helpful, which is rare in the app world.
The combination of a clean fasting timer with educational content works well. You're not just told to fast - you learn why it works and how to optimise your approach.
While there are some billing complaints among the minority of negative reviews, the overall track record is solid. Just be sure to manage your subscription carefully, cancel via your app store, and monitor your statements.
Our verdict: A strong fasting app for beginners. Good ratings, good education, affordable price.
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