# Net Zero Challenge vs Tasmi

The clearest difference is device support: Net Zero Challenge at 3 against Tasmi's 1. Net Zero Challenge also leads on iOS requirement (15.1 vs 18.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Net Zero Challenge | Tasmi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 66 MB | 7 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Green Rewards Ltd](https://appshunter.io/developer/909021443) | [Muhammad Israa Saifullah](https://appshunter.io/developer/1707669412) |

## What reviewers say

### Net Zero Challenge

[App page](https://appshunter.io/ios/app/net-zero-challenge/id1541830052)

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

**In-app purchases:** none


### Tasmi

[App page](https://appshunter.io/ios/app/tasmi/id6770039955)

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

**In-app purchases:** none


## Frequently asked questions

### Is Net Zero Challenge free?

Net Zero Challenge is free to download, with no in-app purchases.

### Is Tasmi free?

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

### Do Net Zero Challenge or Tasmi have ads?

Neither Net Zero Challenge nor Tasmi shows ads.

### Which is updated more often, Net Zero Challenge or Tasmi?

Net Zero Challenge ships an update every 2 months, and Tasmi every 2 months. Most recently, Net Zero Challenge was updated on October 15, 2026 and Tasmi on October 5, 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.*