# Sielmann vs Remember The Future

The clearest difference is update cadence: Sielmann at every 3 weeks against Remember The Future's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Sielmann ships an update every 3 weeks, Remember The Future every 2 months. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Sielmann | Remember The Future |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 71 MB | 554 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Heinz Sielmann Stiftung](https://appshunter.io/developer/1489378252) | [Causa Creations Interactive Media GmbH](https://appshunter.io/developer/1547832624) |

## What reviewers say

### Sielmann

[App page](https://appshunter.io/ios/app/sielmann-biodiversity/id6478953268)

**Features:** macOS Compatibility

**In-app purchases:** none


### Remember The Future

[App page](https://appshunter.io/ios/app/remember-the-future/id6748078686)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sielmann free?

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

### Is Remember The Future free?

Remember The Future is free to download, with no in-app purchases.

### Do Sielmann or Remember The Future have ads?

Neither Sielmann nor Remember The Future shows ads.

### Which is updated more often, Sielmann or Remember The Future?

Sielmann ships an update every 3 weeks, and Remember The Future every 2 months. Most recently, Sielmann was updated on September 30, 2026 and Remember The Future on October 6, 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.*