# ValidSign vs Sijthoff Events

The clearest difference is iOS requirement: ValidSign at 15.1 against Sijthoff Events's 17.0. 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 every 2 months. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ValidSign | Sijthoff Events |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 37 MB | 60 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ValidSign BV](https://appshunter.io/developer/1611769579) | [Sijthoff Media Groep B.V.](https://appshunter.io/developer/1615968307) |

## What reviewers say

### ValidSign

[App page](https://appshunter.io/ios/app/validsign/id1611769577)

**In-app purchases:** none


### Sijthoff Events

[App page](https://appshunter.io/ios/app/sijthoff-events/id1615967915)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ValidSign free?

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

### Is Sijthoff Events free?

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

### Do ValidSign or Sijthoff Events have ads?

Neither ValidSign nor Sijthoff Events shows ads.

### Which is updated more often, ValidSign or Sijthoff Events?

ValidSign ships an update every 2 months, and Sijthoff Events every 2 months. Most recently, ValidSign was updated on October 18, 2026 and Sijthoff Events on October 7, 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.*