# Psychological Tests Library vs Ikzelf

The clearest difference is update cadence: Psychological Tests Library at every 3 days against Ikzelf's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Psychological Tests Library sells 2 in-app purchases, starting at $3.99 per month and Ikzelf sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Psychological Tests Library ships an update every 3 days, Ikzelf every 8 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Psychological Tests Library | Ikzelf |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 8 days |
| Size | 87 MB | 48 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OVVIO Solutions](https://appshunter.io/developer/1700607777) | [Mark Keus](https://appshunter.io/developer/6789270442) |

## What reviewers say

### Psychological Tests Library

[App page](https://appshunter.io/ios/app/psychological-tests-library/id6736412532)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Premium Content | $1.99 | one-time |


### Ikzelf

[App page](https://appshunter.io/ios/app/ikzelf/id6789270440)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full profile + PDF | $0.99 | one-time |


## Frequently asked questions

### Is Psychological Tests Library free?

Psychological Tests Library is free to download, with in-app purchases available.

### Is Ikzelf free?

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

### Do Psychological Tests Library or Ikzelf have ads?

Neither Psychological Tests Library nor Ikzelf shows ads.

### Which is updated more often, Psychological Tests Library or Ikzelf?

Psychological Tests Library ships an update every 3 days, and Ikzelf every 8 days. Most recently, Psychological Tests Library was updated on October 27, 2026 and Ikzelf on October 31, 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.*