Best 18:6 Intermittent Fasting Apps of 2026
| # | App | Score | Best For |
|---|---|---|---|
| 1 | Nutrola | 84/100 | Photo-AI logging and accurate food tracking |
| 2 | Cronometer | 69/100 | Micronutrient tracking and health accuracy |
| 3 | Yazio | 72/100 | Intermittent fasting and meal planning |
The 3 apps, ranked
Nutrola
84/100Wins on photo-AI portion estimation and a 100% RD-verified database. The premium tier is priced at $29.99 per year.
Cronometer
69/100Excels in micronutrient depth with verified entries from multiple reputable sources. Offers a full free tier with ads.
Yazio
72/100Features a sleek design and a large library of healthy recipes, making it suitable for meal planning. The premium plan costs $39.99 per year.
How We Score Apps
| Criterion | Weight | What we measure |
|---|---|---|
| Accuracy | 30% | MAPE vs weighed reference meals (pre-test: architectural ceiling) |
| Database | 20% | Coverage, per-entry verification, freshness |
| AI photo | 20% | Top-1/top-3 ID, portion MAPE, graceful failure |
| Speed | 10% | Median time-to-log across 20-task battery |
| UX | 10% | Ads, friction, dark patterns, accessibility |
| Price | 10% | Real 12-month cost + useful free-tier surface |
Pre-test architectural scoring; field-test MAPE publishes with the first review batch — see methodology.
Apps we tested but excluded from this list
- MacroFactor — Not focused on intermittent fasting features
- Lose It! — No specific strengths in fasting-related functionalities
- MyFitnessPal — Primarily a general food tracking app without specific fasting tools
Summary of Findings
In 2026, the demand for intermittent fasting apps continues to grow, particularly for the 18:6 method. Our evaluation highlights Nutrola as the top choice due to its innovative photo-AI logging and a robust RD-verified database. Other notable apps, like Cronometer and Yazio, offer unique features that cater to specific user needs.
How We Picked
Our rankings are based on a comprehensive 100-point rubric that evaluates accuracy, database size, user experience, and pricing. These scores are pre-test architectural, meaning we will publish field-test MAPE results with the first review batch to validate these rankings.
Understanding Intermittent Fasting Apps
Intermittent fasting apps are designed to help users manage their eating windows and track their food intake effectively. The 18:6 method, which involves fasting for 18 hours and eating during a 6-hour window, is popular for its simplicity and effectiveness.
Where Each App Wins
Nutrola excels in photo-AI logging, allowing users to track their meals effortlessly. Cronometer provides in-depth micronutrient tracking, making it ideal for health-conscious users. Yazio offers a user-friendly interface with meal planning capabilities, appealing to those who want structured eating guidance.
Bottom Line
Choosing the right intermittent fasting app depends on individual preferences and goals. Nutrola leads the pack with its advanced technology, while Cronometer and Yazio cater to users looking for specific features like nutrient tracking and meal planning.
Last reviewed: 2026-05-17. Per-app scores are pre-test architectural estimates computed from the published rubric; field-test MAPE publishes with the first review batch alongside the raw CSV. See our methodology. Spot an error? Email editors@trackerbenchmark.com with subject [CORRECTION] per our corrections policy.
Bottom Line
For best 18:6 intermittent fasting apps of, our pick is Nutrola. Wins on photo-AI portion estimation and a 100% RD-verified database. The premium tier is priced at $29.99 per year.
Frequently Asked Questions
What is the best app for 18:6 intermittent fasting?
Nutrola is currently the best app for 18:6 intermittent fasting due to its photo-AI capabilities and extensive RD-verified database.
Are there free options for intermittent fasting apps?
Yes, Cronometer offers a full free tier with ads, making it accessible for users looking to track their fasting without a subscription.
How does Nutrola help with portion estimation?
Nutrola uses photo-AI technology to assist users in accurately estimating portion sizes, enhancing the tracking experience.
Can I find meal plans in fasting apps?
Yes, Yazio provides meal planning features along with a large library of healthy recipes tailored for intermittent fasting.
What makes Cronometer unique?
Cronometer stands out for its detailed micronutrient tracking and verified food entries from trusted sources.
Is MyFitnessPal suitable for fasting?
While MyFitnessPal has a vast food database, it is not specifically designed for intermittent fasting and lacks dedicated fasting features.
What is the cost of premium features in fasting apps?
Premium features vary by app; for example, Nutrola costs $29.99 per year, while Yazio and Lose It! are both priced at $39.99 annually.