# Contta vs Descarbonize Charger

The clearest difference is in-app purchases: Descarbonize Charger at none against Contta's 3. Descarbonize Charger also leads on iOS requirement (9.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Contta sells 3 in-app purchases, starting at $0.49 per month. Descarbonize Charger asks for nothing beyond the download.

Contta ships an update every 2 weeks, Descarbonize Charger weekly. The most recent releases landed on September 16, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Contta | Descarbonize Charger |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 32 MB | 67 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Moises Neto](https://appshunter.io/developer/1678133901) | [Descarbonize Solucoes SA](https://appshunter.io/developer/1726923016) |

## What reviewers say

### Contta

[App page](https://appshunter.io/ios/app/contta/id6446501434)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.49 | per month |
| Yearly | $4.99 | per year |
| Lifetime | $9.99 | one-time |


### Descarbonize Charger

[App page](https://appshunter.io/ios/app/descarbonize-charger/id6504767335)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Contta free?

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

### Is Descarbonize Charger free?

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

### Do Contta or Descarbonize Charger have ads?

Neither Contta nor Descarbonize Charger shows ads.

### Which is updated more often, Contta or Descarbonize Charger?

Contta ships an update every 2 weeks, and Descarbonize Charger weekly. Most recently, Contta was updated on September 16, 2026 and Descarbonize Charger on September 11, 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.*