Comparison

9toFast vs FastFlow

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

9toFast

Features
Read full description

9toFast is a clean and intuitive intermittent fasting app designed to help you stay consistent without pressure. Whether you’re fasting for better focus, energy, or health, 9toFast makes it easy to track your progress and feel in control. Stay on track effortlessly • Smart fasting timer: Start, pause, or end your fasts anytime and watch your fasting ring fill in real-time. • Custom fasting plans: Choose from popular plans like 16:8 or 18:6, or set your own window. • Progress dashboard: Visualise your streaks and completion rates at a glance. • Personalised themes: Match your app to your mood with sleek light and dark options. • Simple insights: See how your fasting habits evolve over time with easy-to-read stats. Why users love 9toFast • Minimal design that keeps fasting simple • No clutter, ads, or confusing features • Built for balance, not restriction Perfect for beginners and pros Whether you’re new to fasting or have been doing it for years, 9toFast adapts to your lifestyle. Track your fasts, stay consistent, and celebrate small wins daily. Coming soon • Weight tracking • Calorie Counting • Meal Logging • Health app integrations • Fasting challenges • Custom reminders and streak rewards Start your fasting journey today with 9toFast: the fasting tracker that’s simple, motivating, and built for real life.

About

FastFlow

This app helps users manage intermittent fasting schedules with a visual timer and customizable patterns. It also allows for weight tracking, meal logging with photos, and smart notifications to build healthy habits.

Highlights
  • Circular fasting timer
  • Flexible fasting patterns
  • Weight progress graph
  • Meal logging with photos
  • Smart notifications
  • Cloud data sync
Features
Read full description

【Who Is This For?】 • Starting 16:8 intermittent fasting • Want easy fasting time management • Track and visualize weight changes • Achieve autophagy benefits for healthy weight loss 【Key Features】 ■ Beautiful Circular Timer Intuitive display showing remaining fasting or eating time. Elegant design with clear progress visualization. ■ Flexible Fasting Patterns • 16:8 (16-hour fast / 8-hour eating window) • 18:6 (18-hour fast / 6-hour eating window) • 14:10 (14-hour fast / 10-hour eating window) • Custom schedules ■ Weight Progress Graph Record daily weight and visualize changes with line graphs. See your fasting results clearly. ■ Meal Log Document meals with photos. Review what you've eaten anytime. ■ Smart Notifications Get push notifications for fasting start and end times. Build lasting habits effortlessly. ■ Cloud Sync Securely backup your data to the cloud. Transfer seamlessly when switching devices. 【Benefits of Intermittent Fasting】 • Activate autophagy for cellular renewal • Improve insulin sensitivity • Enhance fat burning • Boost focus and mental clarity 【Why FastFlow?】 • 100% free with all features unlocked • Simple, intuitive interface • Privacy-focused design • Clean, distraction-free experience Download now and start your healthy fasting journey!

Screenshots

9toFast4 screens
FastFlow4 screens

Verdict

The call

The clearest difference is in-app purchases: FastFlow at none against 9toFast's 3. 9toFast's advantage is update cadence (fortnightly vs every 4 months). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 9toFast sells 3 in-app purchases, starting at $0.99 per month. FastFlow asks for nothing beyond the download.

UpkeepUpdate frequency

9toFast ships an update fortnightly, FastFlow every 4 months. The most recent releases landed on September 10, 2026 and September 16, 2026 respectively.

Scorecard2 real differences · 6 level
9toFast versus FastFlow: the parameters behind the verdict, then further details
Parameter9toFastFastFlow
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyFortnightly — betterEvery 4 months
AdsYesYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size47 MB34 MB
Age rating4+12+
DeveloperEsther YekiniCaprio Lab

In-app purchases

3 purchases

9toFast

Subscriptions2
  • Premium Monthly$0.991 Month
  • Premium Yearly$9.991 Year
One-time1
  • Premium Lifetime$19.99
None

FastFlow

No in-app purchases

Questions

Is 9toFast free?
9toFast is free to download, with in-app purchases available.
Is FastFlow free?
FastFlow is free to download, with no in-app purchases.
Do 9toFast or FastFlow have ads?
Both 9toFast and FastFlow show ads.
Which is updated more often, 9toFast or FastFlow?
9toFast ships an update fortnightly, and FastFlow every 4 months. Most recently, 9toFast was updated on September 10, 2026 and FastFlow on September 16, 2026.

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