Intermittent Fasting: JustFast

Intermittent Fasting: JustFast

Fasting Tracker & 16:8 Timer

11 ratings
3 reviews
Free
In-App PurchasesWith Ads

Details

Released
October 2, 2025
Updated
October 23, 2026

Features

Intermittent Fasting: JustFast screenshot #1 for iPhone
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About

This app tracks both your fasting periods and your eating windows, offering a unique dual-countdown feature. It visualizes metabolic phases like fat burning and ketosis, supports various fasting methods, and provides insights into your progress. It's designed to be user-friendly and privacy-conscious, working entirely offline.

✓Eating window countdown
✓Fasting phases visualization
✓Support for multiple fasting methods
✓Streak tracking with grace periods
✓Pattern insights
✓Weight and BMI tracking
✓Smart notifications
✓100% offline functionality
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What's New in Intermittent Fasting

1.24.4

October 23, 2026

• Flags in the language picker. • Clearer stats: your usual start time, where half of your fasts begin, streak records at milestones and a cleaner Trends chart. • Dawn to sunset: a start after sunset counts to the next sunset, a plan with an end date returns to your previous plan, and times in Indonesia are more accurate. • Simpler summary after a fast: weight logging has its own screen. • Better translations and bug fixes, including an iOS crash and backdated starts from the watch.

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Subscriptions & In-App Purchases

Just Fast Plus

No ads and long-term insights

$14.991 Year
7 Days trial
How to cancel Intermittent Fasting subscription ⁉️

Events

Read more about 6 weeks to the holidays

6 weeks to the holidays

Five fasts a week, building from 12 to 16 hours

Nov 12, 2026 — Dec 13, 2026

Read more about 7-day reset

7-day reset

Ease back in, from 13 to 16 hours in a week

Nov 2, 2026 — Dec 3, 2026

Read more about OMAD Challenge One Meal a Day

OMAD Challenge One Meal a Day

Try the advanced 23:1 fasting method for one week

Mar 31, 2026 — May 1, 2026

User reviews

O melhor (Já testei muitos)

Super prático ; Simples ; Incentiva!

Destined to become my only fasting app

This app is fairly new, but even so has a lot of great aspects to it. I’m new the fasting, but I’ve used this to track my two fasts and found it very easy to use, I’ve even managed to get my wife to use it.
Outside of the app one thing that I thoroughly am impressed with is the response you get back from the developer. He’s still designing the app as well as adding elements that people using the app for asking for. This will very quickly become my one and only fasting app.
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Easy to use.

Really like the design of this app. It took me a couple of seconds to get used to how you set or adjust the time, but once I figured it out, I really like it! Thank you!

Developer apps

FAQ

What makes Just Fast unique compared to other fasting apps?

Just Fast is the only fasting app that tracks both your fast and your eating window with a dual countdown. It also visualizes metabolic phases like fat burning and ketosis in real time, offering deeper insights into your body's response.

Does Just Fast have ads?

Yes, Just Fast contains light banner ads on secondary screens such as the history and settings views. The main fasting timer screen is completely ad-free.

What fasting schedules does Just Fast support?

Just Fast supports all major fasting methods including 16:8, 18:6, 20:4, OMAD, 14:10, 12:12, 24-hour fasts, and custom durations. Users can choose their preferred schedule during onboarding.

Can I track my weight with Just Fast?

Yes, Just Fast includes weight tracking functionality with BMI calculation. You can log your weight entries and monitor your progress over time within the app.

Is Just Fast available in other languages?

Yes, Just Fast is available in 15 languages, including English, German, French, Spanish, Italian, Japanese, Korean, and Arabic, making it accessible to a global user base.

Does Just Fast require an account or internet connection?

No, Just Fast is 100% offline and does not require an account or signup. This ensures user privacy and allows for use without an internet connection.

How does Just Fast help beginners?

Just Fast offers beginner-friendly onboarding, allowing users to select their goal, fasting expertise, and preferred schedule in minutes. It also provides clear explanations of fasting phases without complex jargon.

What is the update frequency for Just Fast?

The app was last updated on March 27, 2026, indicating ongoing development and support. Users can expect regular updates to improve features and performance.