# DORILOOP vs KnowUp

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

Both are free to download. DORILOOP sells 1 one-off in-app purchase and KnowUp sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

DORILOOP ships an update every 2 weeks, KnowUp every 2 days. The most recent releases landed on October 18, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | DORILOOP | KnowUp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 78 MB | 89 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [naoki waratani](https://appshunter.io/developer/1870038956) | [Wenfeng Duan](https://appshunter.io/developer/1454244715) |

## What reviewers say

### DORILOOP

[App page](https://appshunter.io/ios/app/doriloop/id6757974564)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $3.99 | one-time |


### KnowUp

[App page](https://appshunter.io/ios/app/knowup-ai-flashcards-and-study/id6779905080)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| knowup monthly | $2.99 | per month |
| knowup annual | $24.99 | per year |


## Frequently asked questions

### Is DORILOOP free?

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

### Is KnowUp free?

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

### Do DORILOOP or KnowUp have ads?

DORILOOP shows ads; KnowUp does not.

### Which is updated more often, DORILOOP or KnowUp?

DORILOOP ships an update every 2 weeks, and KnowUp every 2 days. Most recently, DORILOOP was updated on October 18, 2026 and KnowUp on October 20, 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.*