Zero
Zero: A fasting-focused app with broad health tracking and connected-device data. Ranked #31 of 57 in Weight-Loss Apps by our editors (6.1/10); pricing: Free plan · 7-day trial; best for fasting and health-metric tracking.
At a glance
- Editor score6.1 / 10
- PricingFree plan · 7-day trial
- Best forFasting and health-metric tracking
- Free planYes
- Weight trackingYes
- Facts checked23 Oct 2026
Where it wins
- Tracks fasts, weight, sleep, activity, glucose, and ketones
- Connects with Apple Health, Google Fit, Fitbit, and Oura
- Logs meals by photo or text, with nutrition estimates and a Protein Score
Where it doesn't
- No barcode scanner or meal-planning tools
- Advanced statistics and other Plus features require a subscription
- Available on mobile only
Our verdict on Zero
Zero is a mobile fasting and nutrition app for people building weight-loss and health habits. Its core tools center on a fasting timer and history, alongside tracking for weight, sleep, resting heart rate, caloric intake, activity, glucose, and ketones. It is a fit for people who want fasting alongside a wider set of health measures, rather than a dedicated meal-planning app. Zero is available on iOS and Android, with a free version and paid Zero Plus subscriptions.
Health-platform connections are a notable part of the app’s scope: Zero lists direct integrations with Apple Health, Google Fit, Fitbit, and Oura. For meal tracking, it supports photo or text entry with nutrition estimates, and its Protein Score tracks progress toward a protein target. The app also includes personalized water goals and water tracking. These features can suit someone who wants fasting, nutrition, and several health metrics in one mobile routine; people who need meal plans or barcode-based food entry should look elsewhere.
Zero Plus adds an advanced fasting timer, longer-range statistics and trend comparisons, premium content, Fat Burning Mode, and smart meal logging with nutrition estimates and a Protein Score. The published plans include Zero Plus Monthly and Zero Plus Yearly, while the free version provides an entry point for basic use. The product’s focus is tracking rather than meal planning, and it does not include a barcode scanner. Choose Zero if fasting history, health-data connections, and related metrics are central to your routine; consider an alternative if planning meals or scanning packaged foods is essential.
Your product? Our editors can test Zero in depth and publish a review, labelled as paid · from $149/mo →
Zero pricing
Zero fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Barcode scanner | No |
| Nutrition detail | Macros |
| Weight tracking | Yes |
| Meal planning | No |
| Coaching | Automated |
| Device sync | Yes |
| Free trial | 7 days |
| Deployment | Mobile |
| Platforms | iOS, Android |
| Support | Email, Live chat |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 4 integrations: Apple Health, Google Fit, Fitbit, Oura |
| Pricing | Free plan · 7-day trial (source) |
| Website | zerolongevity.com |
| Facts checked | 23 Oct 2026 |
Zero integrations
Zero lists 4 integrations on its own site.
- Apple Health
- Google Fit
- Fitbit
- Oura
Alternatives to Zero
- WeightWatchersStructured nutrition tracking, meal planning, and support, with clinical care on Med+.9.3
- MyFitnessPalA flexible food and fitness tracker with free basics, paid logging tools, and meal planning.9.2
- Lose It!A free calorie budget and weight-loss plan, with extra tracking tools in Premium.9.0
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Featured on iTechGuides
Zero is listed in our Weight-Loss Apps directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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