Window Fasting App Review UK (2026)
A comprehensive fasting app that goes beyond weight loss - multiple health goals with weekly challenges
What is Window?
Window positions itself as "your in-hand intermittent fasting companion" with a science-based approach guided by experts. What sets it apart is the flexibility around goals - most fasting apps assume you want to lose weight.
The app provides personalised recommendations based on your specific lifestyle and objectives, whether that's improved energy, better sleep, or weight management.
Window Features
- Fasting Timer: Track fasting and eating periods
- Multiple Goals: Weight loss, energy, fat burning, sleep, heart health
- Weekly Challenges: Keep motivation high
- Weight Journal: Set goals and monitor progress
- Preset Profiles: Easy switching between fasting patterns
- Manual Mode: Customise for variable schedules
- Timeline Corrections: Fix forgotten tracking easily
- Notifications: Alerts when eating windows open/close
Window Pricing UK
- Monthly: £9.99/month
- Annual: £39.99/year (£3.33/month - save 67%)
- Free Version: Basic timer and reminders only
The yearly plan offers significant savings over monthly. However, there's no free trial to properly test premium features before subscribing.
The App Experience
Window makes getting started and sticking with fasting simple. The goal selection is refreshing - instead of assuming weight loss, it asks what you actually want to achieve. This affects the guidance you receive.
The weekly challenges add gamification without being gimmicky. They provide structure and small wins that keep motivation high during what can be a challenging lifestyle change.
The timeline corrections are genuinely useful - life doesn't always follow your fasting schedule, and being able to retroactively adjust when you forgot to track removes frustration.
Pros & Cons
Pros
- Multiple health goals (not just weight)
- Science-based approach
- Weekly challenges for motivation
- Flexible preset and manual modes
- Easy timeline corrections
- Clear UK pricing
- Good notification system
Cons
- No free trial of premium
- Limited fasting variations
- Customer support concerns
- Free version very basic
- Monthly price quite high
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What Real Users Say
Window has positive App Store reviews, with users praising the flexibility and goal-setting options.
"There are preset fasting profiles and it's easy to switch from one to another but I use the manual setting because I fast for a different amount of time everyday depending on what's going on in my life. It's also easy to make corrections when you forget to track." - App Store review
"If you'd like to lose weight, Window might be a good option. The ability to select fasting goals other than weight loss is unique and useful." - Prevention magazine review
What positive reviewers say: Flexible goal setting, easy tracking, motivating challenges, good for varied schedules
What negative reviewers say: Limited fasting variation options, customer support could be better
Who Window Is For
Non-Weight Goals
Want energy, sleep, or heart health focus.
Variable Schedules
Need flexibility in fasting times.
Challenge Motivated
Weekly challenges keep you engaged.
Science-Focused
Want evidence-based guidance.
Who Should Look Elsewhere
- Free app seekers: Basic free version is very limited
- Try-before-buy types: No meaningful trial available
- Advanced fasters: Limited fasting protocol variations
The Bottom Line
Window offers a thoughtful approach to fasting that acknowledges people have different goals beyond weight loss. The ability to track for energy, sleep quality, or heart health alongside weight makes it more versatile than many competitors.
The weekly challenges provide structure and motivation, while the flexible manual mode accommodates real-life schedules that don't always follow a strict pattern.
The main hesitation is the lack of a free trial. At £39.99/year it's reasonably priced, but you're committing without truly testing the premium features first.
Our verdict: Strong fasting app with unique goal flexibility. Worth considering if you know you want premium features.
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