# Koppert One vs Source.ag

The clearest difference is ads: Source.ag at none against Koppert One's shown. Source.ag also leads on update cadence (every 4 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Koppert One ships an update every 2 months, Source.ag every 4 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Koppert One | Source.ag |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 84 MB | 151 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Koppert Biological Systems](https://appshunter.io/developer/1100137913) | [Source.ag B.V.](https://appshunter.io/developer/1616140864) |

## What reviewers say

### Koppert One

[App page](https://appshunter.io/ios/app/koppert-one/id1100137914)

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

**In-app purchases:** none


### Source.ag

[App page](https://appshunter.io/ios/app/sourceag/id6775826276)

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

**In-app purchases:** none


## Frequently asked questions

### Is Koppert One free?

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

### Is Source.ag free?

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

### Do Koppert One or Source.ag have ads?

Koppert One shows ads; Source.ag does not.

### Which is updated more often, Koppert One or Source.ag?

Koppert One ships an update every 2 months, and Source.ag every 4 days. Most recently, Koppert One was updated on November 2, 2026 and Source.ag on November 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.*