# PreviApp vs known official

The clearest difference is update cadence: PreviApp at every 4 days against known official's every 3 weeks. 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.

PreviApp ships an update every 4 days, known official every 3 weeks. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PreviApp | known official |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Size | 73 MB | 49 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Javier Diaz Fernandez](https://appshunter.io/developer/1809048714) | [Andrew Jevin](https://appshunter.io/developer/1828746692) |

## What reviewers say

### PreviApp

[App page](https://appshunter.io/ios/app/previapp/id6744716491)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### known official

[App page](https://appshunter.io/ios/app/known-official/id6749086028)

**In-app purchases:** none


## Frequently asked questions

### Is PreviApp free?

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

### Is known official free?

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

### Do PreviApp or known official have ads?

Neither PreviApp nor known official shows ads.

### Which is updated more often, PreviApp or known official?

PreviApp ships an update every 4 days, and known official every 3 weeks. Most recently, PreviApp was updated on October 13, 2026 and known official on October 9, 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.*