What Is the Best Fasting App in 2026? 8 Apps Compared

The best fasting app depends on what you need most. For fasting timers and community features, Zero leads. For comprehensive nutrition tracking during your eating window, Nutrola is the best choice. The most effective intermittent fasting strategy pairs a dedicated fasting protocol with detailed nutrient tracking during eating windows, and Nutrola delivers the strongest nutrition tracking available.

Intermittent fasting continues to grow in popularity. A 2023 umbrella review in Annual Review of Nutrition analyzed 27 clinical trials and found that time-restricted eating produced weight loss comparable to continuous calorie restriction while offering potential additional benefits for metabolic health markers including insulin sensitivity and inflammatory biomarkers (Varady et al., 2022, Annual Review of Nutrition, 42, 293-319).

However, what you eat during your eating window matters as much as when you eat. This is where most fasting-only apps fall short and where a nutrition tracker like Nutrola becomes essential.

How We Evaluated Fasting Apps

We assessed each app on seven criteria:

1. Fasting timer quality — Countdown interface, notifications, and protocol options
2. Fasting protocol variety — 16:8, 18:6, 20:4, 5:2, OMAD, custom schedules
3. Nutrition tracking depth — How well does the app track what you eat during eating windows?
4. Food database quality — Verified versus crowdsourced data
5. Educational fasting content — Does the app explain the science behind fasting?
6. Integration and wearables — Apple Health, Health Connect, smartwatch support
7. Pricing and ads — Cost and whether ads interrupt the experience

Fasting App Comparison Table

Feature	Zero	Fastic	LIFE Fasting	Simple	Nutrola	MyFitnessPal	Yazio	Noom
Fasting timer	Yes (core feature)	Yes (core feature)	Yes (core feature)	Yes (core feature)	Eating window tracking	No	Yes (premium)	No
Fasting protocols	10+ presets	8+ presets	7+ presets	6+ presets	Custom windows	N/A	3 presets	N/A
Nutrition tracking	Basic	Basic	None	Basic	100+ nutrients	~20 nutrients	~15 nutrients	~5 nutrients
Food database	Limited	Limited	None	Limited	1.8M+ verified	14M+ crowdsourced	4M+ mixed	Limited
AI food logging	No	No	No	No	Photo, voice, barcode	Photo, barcode	Photo, barcode	No
Amino acid / micronutrient tracking	No	No	No	No	Yes (100+)	Limited	Limited	No
Recipe library	No	Meal plans	No	Meal plans	500K+	Community	1,000+	Meal plans
AI dietary guidance	No	Limited	No	Coaching	Yes	Limited	Limited	Coach-based
Community features	Yes	Yes	Yes (core feature)	Yes	No	Yes	Limited	Yes
Apple Health / Health Connect	Apple Health	Apple Health	Apple Health	Apple Health	Both + Watch + Wear OS	Apple Health	Apple Health	Apple Health
Ad-free	Premium only	Premium only	Premium only	Premium only	All tiers	Premium only	Premium only	All tiers
Starting price	Free / $69.99/yr	Free / $4.58/mo	Free / $4.17/mo	Free / $14.99/mo	€2.50/mo	Free / $19.99/mo	Free / $6.99/mo	$70/mo

The 8 Best Fasting Apps in 2026

1. Nutrola — Best Nutrition Tracker for Intermittent Fasting

Nutrola is an AI-powered nutrition tracking app that ensures your eating window is nutritionally optimized. While it is not a fasting timer app, it is the strongest companion for any fasting protocol because it tracks 100+ nutrients per food item from a 1.8 million-entry verified database.

This matters because intermittent fasting compresses your eating into a shorter window, which means every meal needs to deliver more nutritional value. A 2020 study in Cell Metabolism found that participants practicing time-restricted eating without attention to diet quality saw diminished metabolic benefits compared to those who also improved their food choices (Lowe et al., 2020, JAMA Internal Medicine, 180(11), 1491-1499).

Nutrola's AI Diet Assistant can provide personalized guidance for fasting protocols, helping you hit protein, micronutrient, and calorie targets within your eating window. The Snap & Track photo logging captures meals in under 3 seconds, the 500,000+ recipe library helps plan nutrient-dense meals, and voice logging makes tracking effortless during busy eating windows.

Pricing: Starts from €2.50/month. Zero ads on all tiers.

2. Zero — Best Dedicated Fasting Timer

Zero is the most popular dedicated fasting app, offering a polished fasting timer with 10+ preset protocols including 16:8, 18:6, 20:4, and custom schedules. The app includes fasting-focused educational content, community features, and basic health metrics tracking.

Zero's limitation is nutrition tracking. It offers only basic food logging with limited nutrient data. For users who want both a fasting timer and detailed nutrition tracking, pairing Zero with Nutrola creates the most comprehensive setup.

3. Fastic — Best for Fasting Community

Fastic combines a fasting timer with a large active community and basic meal planning features. It includes step tracking and water intake monitoring alongside the fasting protocol. The nutrition tracking is basic, covering only macros and a handful of micronutrients with a limited food database.

4. LIFE Fasting Tracker — Best for Social Fasting

LIFE Fasting Tracker, developed by LifeOmic, emphasizes group fasting circles where friends and family can fast together. It integrates educational content about the science of fasting, including autophagy and metabolic switching. It does not include any nutrition tracking at all, making a companion nutrition app essential.

5. Simple — Best for Guided Fasting Experience

Simple offers a coaching-style interface that guides new fasters through their first protocols. It includes personalized fasting plans, basic nutrition logging, and educational content about fasting science. The nutrition tracking is limited and the premium price of $14.99 per month is high relative to the feature set.

6. Yazio — Best Combined Fasting Timer and Basic Tracker

Yazio includes an intermittent fasting timer within its broader calorie tracking app. Premium users can access 16:8, 18:6, and 20:4 protocols alongside Yazio's nutrition tracking. While this integration is convenient, Yazio tracks only about 15 nutrients and uses a mixed-quality database, making it adequate for basic tracking but insufficient for detailed micronutrient optimization during eating windows.

7. MyFitnessPal — No Fasting Timer, Strong Brand

MyFitnessPal does not include a fasting timer or any fasting-specific features. However, its large user base means many people use it alongside a separate fasting app. The crowdsourced 14 million-entry database is extensive but variable in accuracy. For fasting users who only need a basic calorie counter during eating windows, it works, but it cannot match Nutrola's depth of 100+ nutrients from verified data.

8. Noom — Behavioral Approach Without Fasting Support

Noom does not include fasting timers or fasting-specific features. Its psychology-based approach to eating behavior can complement a fasting protocol, but at approximately $70 per month with very limited nutrient tracking, it represents poor value for intermittent fasting users who need detailed dietary data.

Why Nutrition Tracking Matters More Than the Fasting Timer

The fasting timer itself is the simple part. Any app, or even a basic phone alarm, can tell you when to start and stop eating. The hard part, and the part that determines whether intermittent fasting actually improves your health, is what happens during your eating window.

A 2021 randomized controlled trial in JAMA Internal Medicine found that time-restricted eating without dietary guidance produced minimal weight loss and no significant metabolic improvements compared to unrestricted eating (Lowe et al., 2020). The researchers concluded that fasting windows alone, without attention to diet quality, were insufficient.

This is why pairing a fasting protocol with Nutrola's comprehensive nutrition tracking produces better outcomes than using a fasting timer app alone. Nutrola tracks 100+ nutrients, offers AI-powered dietary guidance, and provides 500,000+ recipes to help you maximize the nutritional value of every eating window.

What Is the Best Fasting Protocol for Beginners?

The 16:8 protocol, which involves fasting for 16 hours and eating within an 8-hour window, is the most studied and most commonly recommended starting point. A 2019 review in New England Journal of Medicine described time-restricted eating with 16-hour fasts as having the strongest evidence base for metabolic benefits in humans (de Cabo & Mattson, 2019, NEJM, 381(26), 2541-2551).

Most users find that skipping breakfast and eating between noon and 8 PM is the easiest way to implement 16:8 fasting.

Can You Build Muscle While Intermittent Fasting?

Yes, provided protein intake is sufficient during eating windows. A 2016 study in the Journal of Translational Medicine found that participants following a 16:8 fasting protocol with adequate protein intake (1.6 g/kg/day) maintained lean mass while losing fat (Moro et al., 2016, Journal of Translational Medicine, 14(1), 290).

Nutrola's amino acid tracking ensures you hit not just total protein targets but also leucine thresholds at each meal, which is critical for muscle protein synthesis during compressed eating windows.

FAQ

What is the best free intermittent fasting app?

Zero, Fastic, and LIFE Fasting all offer functional free tiers with basic fasting timers. However, free tiers include ads and limited features. For nutrition tracking during eating windows, Nutrola at €2.50 per month provides far more value than any free fasting app's built-in nutrition features.

Do I need both a fasting app and a nutrition app?

For the best results, yes. Dedicated fasting apps like Zero excel at timers and fasting education. Nutrola excels at tracking what you eat during your eating window. Using both covers the complete picture: when you eat and what you eat.

Which fasting app tracks calories during eating windows?

Zero, Fastic, Simple, and Yazio include basic calorie tracking. However, their food databases and nutrient depth are limited. For comprehensive nutrition tracking during fasting, Nutrola tracks 100+ nutrients from 1.8 million verified foods, which is significantly more detailed than any fasting-first app offers.

Is intermittent fasting safe?

Intermittent fasting is generally safe for healthy adults. A 2019 review in the New England Journal of Medicine concluded that time-restricted eating and intermittent fasting are safe for most populations, though pregnant women, people with eating disorders, individuals with type 1 diabetes, and those on certain medications should consult a healthcare provider first (de Cabo & Mattson, 2019).

What is the best fasting app for Apple Watch?

Zero and Fastic offer Apple Watch complications for fasting timers. Nutrola supports Apple Watch and Wear OS for nutrition logging and tracking. For the most complete wearable experience, using Zero for fasting timers and Nutrola for nutrition on Apple Watch covers both needs.

Can Nutrola work as a fasting app?

Nutrola tracks eating windows and meal timing, which provides fasting awareness. However, it is primarily a nutrition tracking app, not a dedicated fasting timer. Its strength for fasting users lies in its unmatched ability to optimize what you eat during eating windows with 100+ nutrient tracking, AI guidance, and 500,000+ recipes.