# Zerot vs Calyra

The clearest difference is in-app purchases: Zerot at none against Calyra's 3. Zerot also leads on ads (none vs shown). Calyra's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price and update cadence there is nothing between them.

Both are free to download. Calyra sells 3 in-app purchases, starting at $9.99 per month. Zerot asks for nothing beyond the download.

Zerot ships an update weekly, Calyra every 10 days. The most recent releases landed on October 2, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Zerot | Calyra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (147 ratings)](https://appshunter.io/ios/app/calyra-ai-calorie-tracker/id6748324995/reviews)** |
| Number of ratings | — | **147** |
| Positive reviews | — | 58.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | — | Free with in-app purchases |
| Size | 52 MB | 77 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Gabor Lorant Kiss](https://appshunter.io/developer/1772224187) | [Nutria SAS](https://appshunter.io/developer/1873299773) |

## What reviewers say

### Zerot

[App page](https://appshunter.io/ios/app/zerot/id6744820215)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Calyra

[App page](https://appshunter.io/ios/app/calyra-ai-calorie-tracker/id6748324995)

Easily track your daily calorie and nutritional intake by photographing meals or scanning barcodes. Get detailed insights into your weight, BMI, and micronutrients to achieve your health goals with an intuitive interface.

**Highlights:** Photo meal analysis, Barcode scanning for nutrition, Weight and BMI tracking, Micronutrient overview, Daily statistics analysis, Intuitive user interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $9.99 | per month |
| 1 Year Subscription - Offer | $29.99 | per year |
| 1 year subscription | $49.99 | per year |


## Frequently asked questions

### Is Zerot free?

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

### Is Calyra free?

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

### Do Zerot or Calyra have ads?

Calyra shows ads; Zerot does not.

### Which is updated more often, Zerot or Calyra?

Zerot ships an update weekly, and Calyra every 10 days. Most recently, Zerot was updated on October 2, 2026 and Calyra on October 28, 2026.

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