# Know AI vs Passlify

The clearest difference is device support: Know AI at 3 against Passlify's 1. Know AI also leads on iOS requirement (15.1 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Know AI sells 2 in-app purchases, starting at $9.99 per month and Passlify sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Know AI | Passlify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 32 MB | 33 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [DEVNEST (PTY) LTD](https://appshunter.io/developer/1803135127) | [STANISŁAW MAKIJENKO](https://appshunter.io/developer/1842954559) |

## What reviewers say

### Know AI

[App page](https://appshunter.io/ios/app/know-ai-homework-solver/id6746722205)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Yearly Subscription | $69.99 | per year |


### Passlify

[App page](https://appshunter.io/ios/app/passlify-ai-test-solver/id6753190620)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Plan | $6.99 | per 7 days |
| Premium Monthly Plan | $16.99 | per month |


## Frequently asked questions

### Is Know AI free?

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

### Is Passlify free?

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

### Do Know AI or Passlify have ads?

Neither Know AI nor Passlify shows ads.

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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.*