# Challo vs NDC Greenprint

The clearest difference is device support: NDC Greenprint at 3 against Challo's 1. NDC Greenprint also leads on iOS requirement (14.0.0 vs 16.1). 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 weekly. Both last shipped on October 27, 2026.

## The numbers

| Metric | Challo | NDC Greenprint |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 1 MB | 75 MB |
| Requires iOS | 16.1 | **14.0.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Mathieu Lamvohee](https://appshunter.io/developer/1539325118) | [Nana Poku Boakye](https://appshunter.io/developer/1590461012) |

## What reviewers say

### Challo

[App page](https://appshunter.io/ios/app/challo/id6448210566)

**Features:** macOS Compatibility

**In-app purchases:** none


### NDC Greenprint

[App page](https://appshunter.io/ios/app/ndc-greenprint/id6643160624)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Challo free?

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

### Is NDC Greenprint free?

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

### Do Challo or NDC Greenprint have ads?

Neither Challo nor NDC Greenprint shows ads.

### Which is updated more often, Challo or NDC Greenprint?

Challo ships an update weekly, and NDC Greenprint weekly. Most recently, Challo was updated on October 27, 2026 and NDC Greenprint on October 27, 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.*