# Cerne vs Dotchii

The clearest difference is in-app purchases: Cerne at none against Dotchii's 2. Dotchii's advantage is update cadence (daily vs every 4 days) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Dotchii sells 2 in-app purchases, starting at $9.99 per month. Cerne asks for nothing beyond the download.

Cerne ships an update every 4 days, Dotchii daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Cerne | Dotchii |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cerne-co-capture/id6751984534/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Daily** |
| Monetization | Free | — |
| Size | 12 MB | 23 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrei Rech](https://appshunter.io/developer/1835715465) | [Pedro Henrique Sudario da Silva](https://appshunter.io/developer/1810771547) |

## What reviewers say

### Cerne

[App page](https://appshunter.io/ios/app/cerne-co-capture/id6751984534)

Measure and understand your carbon footprint by identifying trees with augmented reality. Track your personal impact and contribute to a collaborative map of CO₂ capture, helping to support environmental research and reforestation.

**Highlights:** Augmented reality tree identification, Carbon sequestration calculation, Collaborative community mapping, Individual and collective impact tracking, Biodiversity and flora information, CO₂ neutralized and oxygen generated reports

**Features:** macOS Compatibility

**In-app purchases:** none


### Dotchii

[App page](https://appshunter.io/ios/app/dotchii/id6761321415)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Annual Subscription | $79.99 | per year |


## Frequently asked questions

### Is Cerne free?

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

### Is Dotchii free?

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

### Do Cerne or Dotchii have ads?

Neither Cerne nor Dotchii shows ads.

### Which is updated more often, Cerne or Dotchii?

Cerne ships an update every 4 days, and Dotchii daily. Most recently, Cerne was updated on October 30, 2026 and Dotchii on October 31, 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.*