# knowra vs JustFlip

The clearest difference is update cadence: JustFlip at every 5 days against knowra's every 7 months. JustFlip also leads on device support (4 vs 1) and iOS requirement (17.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. knowra sells 4 in-app purchases, starting at $9.99 per month and JustFlip sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

knowra ships an update every 7 months, JustFlip every 5 days. The most recent releases landed on October 11, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | knowra | JustFlip |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 days** |
| Size | 11 MB | 145 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [瑞基 张](https://appshunter.io/developer/1862070303) | [DANIEL CECH](https://appshunter.io/developer/1896564059) |

## What reviewers say

### knowra

[App page](https://appshunter.io/ios/app/knowra/id6756664484)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Monthly | $9.99 | per month |
| Pro Yearly | $99.00 | per year |
| Pro Yearly | $99.99 | per year |


### JustFlip

[App page](https://appshunter.io/ios/app/justflip-flashcards/id6770141421)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JustFlip Pro Monthly | $1.99 | per month |
| JustFlip Pro Yearly | $5.99 | per year |
| JustFlip Pro Lifetime | $12.99 | one-time |


## Frequently asked questions

### Is knowra free?

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

### Is JustFlip free?

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

### Do knowra or JustFlip have ads?

Neither knowra nor JustFlip shows ads.

### Which is updated more often, knowra or JustFlip?

knowra ships an update every 7 months, and JustFlip every 5 days. Most recently, knowra was updated on October 11, 2026 and JustFlip on September 28, 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.*