Best Intermittent Fasting Apps
Fasting apps are mostly timers with a content layer. We graded which ones actually justify their subscriptions.
By Fitness Reviewed Editorial Team · Updated · 6 apps reviewed · Editorially independent
The 2026 ranking
Ranked best to worst
Zero Editor's Pick
The reference fasting app – clean, research-backed, no nonsense.
Simple
AI fasting coach with food photo logging.
Fastic
Gamified fasting with a strong community.
DoFasting
Fasting + workout + meal-plan bundle.
Window
Minimalist fasting timer.
Life Fasting Tracker
Free, dead-simple fasting tracker with social circles.
Full reviews
#1 · Zero Editor's Pick
The reference fasting app – clean, research-backed, no nonsense.
Best for: Most people starting IF · Pricing: Free; Plus $69.99/yr · Platforms: iOS, Android
Pros
- Clean, focused UI
- Research-anchored content from credible advisors
- Good HealthKit integration
Cons
- Plus tier is needed for personalized plans
- Some content gates feel arbitrary
#2 · Simple
AI fasting coach with food photo logging.
Best for: Combining fasting with light food tracking · Pricing: $29.99/mo or $89.99/yr · Platforms: iOS, Android
Pros
- Decent AI photo logging
- Friendly onboarding
Cons
- Pricey
- Coaching is more cheerleading than science
#3 · Fastic
Gamified fasting with a strong community.
Best for: People who want a community · Pricing: Free; Premium $59.99/yr · Platforms: iOS, Android
Pros
- Gamification keeps streaks going
- Big community
Cons
- Content is shallow
- Lots of upselling
#4 · DoFasting
Fasting + workout + meal-plan bundle.
Best for: All-in-one starter bundle · Pricing: $46.99/3 months · Platforms: iOS, Android
Pros
- Includes workouts and recipes
- Quiz-driven personalization
Cons
- Quiz pricing tactics are aggressive
- Jack of all trades
#5 · Window
Minimalist fasting timer.
Best for: Minimalists · Pricing: Free; Premium $39.99/yr · Platforms: iOS
Pros
- Beautiful, minimal UI
- No fluff
Cons
- iOS only
- Limited coaching
#6 · Life Fasting Tracker
Free, dead-simple fasting tracker with social circles.
Best for: Anyone wanting a free option · Pricing: Free · Platforms: iOS, Android
Pros
- Free
- Group fasting features
Cons
- Limited insights
- Development has been slow
Comparison table
| Rank | App | Score | Pricing | Best for |
|---|---|---|---|---|
| #1 | Zero | 8.7/10 | Free; Plus $69.99/yr | Most people starting IF |
| #2 | Simple | 8.1/10 | $29.99/mo or $89.99/yr | Combining fasting with light food tracking |
| #3 | Fastic | 7.6/10 | Free; Premium $59.99/yr | People who want a community |
| #4 | DoFasting | 7.2/10 | $46.99/3 months | All-in-one starter bundle |
| #5 | Window | 7/10 | Free; Premium $39.99/yr | Minimalists |
| #6 | Life Fasting Tracker | 6.8/10 | Free | Anyone wanting a free option |
How we ranked best intermittent fasting apps
We evaluated each app on the quality of its fasting protocols (vs. published research), coaching/behavior content, integrations (HealthKit, scales, GLP-1s), customization, and value. Apps relying on autophagy hand-waving lose points.
Fasting alone isn’t a weight loss strategy
The evidence on intermittent fasting in 2026 is clearer than the marketing: it’s an eating schedule, not a metabolic hack. People who lose weight on IF lose it because the compressed window reduces total intake. Pair a fasting app with a calorie tracker and a weight loss coach for the actual results.
Further reading
- Nutrition Review Journal – reviews of fasting protocols and evidence.
- NEJM, “Effects of Intermittent Fasting on Health, Aging, and Disease” (de Cabo & Mattson, 2019): nejm.org
- Harvard Health on intermittent fasting: health.harvard.edu
- NIH on time-restricted eating: pubmed.ncbi.nlm.nih.gov/35443107
Tools & related rankings
- Weight Loss Calculators – calorie-deficit math behind any fasting protocol
- Calorie Counters – calorie counter reviews
- Best calorie tracking apps to pair with a fasting timer
- Best weight loss coaching apps
- Best GLP-1 companion apps – appetite-suppressing meds vs. fasting
Frequently asked questions
What is the best intermittent fasting app in 2026?
Zero – it's the cleanest, most evidence-respecting fasting app, and its free tier covers most users. Simple is a strong runner-up if you want AI food logging combined with fasting.
Do I need a fasting app to do intermittent fasting?
No – a kitchen timer works. The case for an app is habit support, content, and integration with sleep/weight/HealthKit data so you can see how fasting affects the rest of your life.
Can I combine fasting with a GLP-1 medication?
Talk to your prescriber. Many people on GLP-1s already eat in compressed windows naturally because of reduced appetite. See our [GLP-1 apps ranking](/categories/glp-1-apps/) for tools that account for this.
Should I track calories while fasting?
If weight loss is the goal, yes – fasting alone doesn't override calorie intake. Pair a fasting app with a tracker like [Welling](/categories/calorie-tracking-apps/).
Looking for an all-in-one weight loss companion?
Welling combines calorie tracking, AI coaching, and behavior science in one app. Free to try.