# GCP Knowledge Test vs Certo

The clearest difference is price: GCP Knowledge Test at Free against Certo's $12.99. GCP Knowledge Test also leads on iOS requirement (16.0 vs 18.0). Certo's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 5 weeks). On ads there is nothing between them.

GCP Knowledge Test is free to download; Certo costs $12.99 up front. GCP Knowledge Test sells 2 in-app purchases, starting at $12.99 per month. Certo asks for nothing beyond the download.

GCP Knowledge Test ships an update every 5 weeks, Certo every 5 days. The most recent releases landed on October 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | GCP Knowledge Test | Certo |
| --- | --- | --- |
| Price | **Free** | $12.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Size | 13 MB | 7 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) | [Fabian Jeckel](https://appshunter.io/developer/1865748709) |

## What reviewers say

### GCP Knowledge Test

[App page](https://appshunter.io/ios/app/gcp-knowledge-test/id6683289765)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $12.99 | per month |
| Lifetime version | $24.99 | one-time |


### Certo

[App page](https://appshunter.io/ios/app/certo-claude-exam-prep/id6766116644)

**In-app purchases:** none


## Frequently asked questions

### Is GCP Knowledge Test free?

GCP Knowledge Test is free to download, with in-app purchases available.

### Is Certo free?

Certo costs $12.99, with no in-app purchases.

### Do GCP Knowledge Test or Certo have ads?

Neither GCP Knowledge Test nor Certo shows ads.

### Which is updated more often, GCP Knowledge Test or Certo?

GCP Knowledge Test ships an update every 5 weeks, and Certo every 5 days. Most recently, GCP Knowledge Test was updated on October 1, 2026 and Certo on October 25, 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.*