# CertAI vs Lingui

The clearest difference is in-app purchases: Lingui at none against CertAI's 2. Lingui also leads on update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CertAI sells 2 in-app purchases, starting at $19.99 per month. Lingui asks for nothing beyond the download.

CertAI ships an update every 3 weeks, Lingui every 2 days. The most recent releases landed on October 28, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CertAI | Lingui |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 8 MB | 16 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [JunSoft Mobile Inc.](https://appshunter.io/developer/338527432) | [Maxime Boschert](https://appshunter.io/developer/1511604346) |

## What reviewers say

### CertAI

[App page](https://appshunter.io/ios/app/certai-aws-comptia-exam-prep/id6760124211)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CertAI Pro Monthly | $19.99 | per month |
| CertAI Pro Yearly | $140.99 | per year |


### Lingui

[App page](https://appshunter.io/ios/app/lingui/id6760627080)

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

**In-app purchases:** none


## Frequently asked questions

### Is CertAI free?

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

### Is Lingui free?

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

### Do CertAI or Lingui have ads?

Neither CertAI nor Lingui shows ads.

### Which is updated more often, CertAI or Lingui?

CertAI ships an update every 3 weeks, and Lingui every 2 days. Most recently, CertAI was updated on October 28, 2026 and Lingui 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.*