# The Falstad Centre vs InStay

The clearest difference is device support: InStay at 2 against The Falstad Centre's —. The Falstad Centre's advantage is iOS requirement (10.3 vs 16.0). On price 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.

## The numbers

| Metric | The Falstad Centre | InStay |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 3 weeks |
| Size | 98 MB | 23 MB |
| Requires iOS | **10.3** | 16.0 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Utviklerne AS](https://appshunter.io/developer/500637243) | [Invite Guest Technology AS](https://appshunter.io/developer/1780133350) |

## What reviewers say

### The Falstad Centre

[App page](https://appshunter.io/ios/app/the-falstad-centre/id1585047953)

**In-app purchases:** none


### InStay

[App page](https://appshunter.io/ios/app/instay/id6738310655)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is The Falstad Centre free?

The Falstad Centre is free to download, with no in-app purchases.

### Is InStay free?

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

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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.*