# ScanOnce vs Numerus

The clearest difference is in-app purchases: Numerus at none against ScanOnce's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ScanOnce sells 1 one-off in-app purchase. Numerus asks for nothing beyond the download.

## The numbers

| Metric | ScanOnce | Numerus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 3 MB | 34 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Johanna Hoppe](https://appshunter.io/developer/1869099620) | [Viento Digital](https://appshunter.io/developer/768009504) |

## What reviewers say

### ScanOnce

[App page](https://appshunter.io/ios/app/scanonce/id6759916701)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $3.99 | one-time |


### Numerus

[App page](https://appshunter.io/ios/app/numerus-calculation-notebook/id6798961056)

**In-app purchases:** none


## Frequently asked questions

### Is ScanOnce free?

ScanOnce is free to download, with in-app purchases available.

### Is Numerus free?

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

### Do ScanOnce or Numerus have ads?

Neither ScanOnce nor Numerus shows ads.

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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.*