# Zero vs OnTimePoint

The clearest difference is in-app purchases: OnTimePoint at none against Zero's 17. OnTimePoint also leads on iOS requirement (13.4 vs 17.0). Zero's advantage is update cadence (every 2 weeks vs every 4 months) and ratings volume (445K vs 3). On price, rating, ads and device support there is nothing between them.

Both are free to download. Zero sells 10 in-app purchases, starting at $9.99 per month. OnTimePoint asks for nothing beyond the download.

OnTimePoint holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 3, so its average is the more settled of the two.

Zero ships an update every 2 weeks, OnTimePoint every 4 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Zero | OnTimePoint |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (445K ratings)](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ontimepoint/id1477830846/reviews)** |
| Number of ratings | **445K** | 3 |
| Positive reviews | 32.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Freemium | **Free** |
| Best chart rank | **#135** | — |
| Size | 195 MB | 21 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Zero Longevity Science, Inc.](https://appshunter.io/developer/1397458636) | [Salimetrics LLC](https://appshunter.io/developer/1477830845) |

## What reviewers say

### Zero

[App page](https://appshunter.io/ios/app/zero-fasting-and-food-tracker/id1168348542)

**Currently charting:** #135 Top Grossing · Health & Fitness (US App Store)

This app tracks intermittent fasting and nutrition to help users achieve real body composition changes. It integrates fasting, protein intake, meals, hydration, and habits for a holistic approach to weight loss and metabolic health.

**Highlights:** Intermittent fasting timers and streaks, Smart meal logging with photo recognition, Personalized daily protein target tracking, Integrated fasting and protein tracking, Water and habit tracking, Science-based insights on fasting and nutrition

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zero Plus Subscription | $9.99 | per month |
| Zero Plus Subscription | $9.99 | per month |
| Zero Plus Subscription | $39.99 | per year |
| Zero Plus Subscription | $49.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $69.99 | per year |
| Zero Plus Subscription | $89.99 | per year |
| Zero Plus Subscription | $89.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 📊 Helpful tracking and data
- 💡 Informative learning resources
- 🔍 Detailed fasting information
- 🤝 Sense of community

**What reviewers complain about**

- 💰 Expensive premium subscription
- 🔒 Forced account creation
- 🙄 Intrusive ads and upsells
- 🤔 Inconsistent or confusing UI changes
- 🐛 Syncing and login issues

**Reported bugs**

- Password reset problems
- Inaccurate fasting time tracking
- Inability to exit trial without subscribing

**Requested features**

- Custom fasting periods longer than 24 hours
- Ability to edit fasting type and duration
- Integration with more health/fitness apps
- Water intake tracking
- Personalized fasting recommendations


### OnTimePoint

[App page](https://appshunter.io/ios/app/ontimepoint/id1477830846)

This system helps researchers track the exact time study samples are collected in real-time. It ensures participants adhere to saliva collection protocols, providing researchers with immediate insights and control over sample compliance.

**Highlights:** Real-time sample collection time tracking, Participant compliance monitoring, Saliva collection protocol adherence, Researcher insights and control, Study sample management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zero free?

Zero is free to download, with in-app purchases available.

### Is OnTimePoint free?

OnTimePoint is free to download, with no in-app purchases.

### Which has better reviews, Zero or OnTimePoint?

OnTimePoint is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while OnTimePoint averages 5.0 from 3 ratings.

### Do Zero or OnTimePoint have ads?

Neither Zero nor OnTimePoint shows ads.

### Which is updated more often, Zero or OnTimePoint?

Zero ships an update every 2 weeks, and OnTimePoint every 4 months. Most recently, Zero was updated on November 1, 2026 and OnTimePoint on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*