# iPemo Lite vs KnowTree

The clearest difference is in-app purchases: iPemo Lite at none against KnowTree's 1. iPemo Lite also leads on ads (none vs shown) and iOS requirement (10.0 vs 15.1). KnowTree's advantage is update cadence (every 9 days vs every 68 months). On price and device support there is nothing between them.

Both are free to download. KnowTree sells 1 one-off in-app purchase. iPemo Lite asks for nothing beyond the download.

iPemo Lite ships an update every 68 months, KnowTree every 9 days. The most recent releases landed on June 5, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | iPemo Lite | KnowTree |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 68 months | **Every 9 days** |
| Size | 1 MB | 51 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuo Sakamoto](https://appshunter.io/developer/333281139) | [Ukon Ryohei](https://appshunter.io/developer/1834526187) |

## What reviewers say

### iPemo Lite

[App page](https://appshunter.io/ios/app/ipemo-lite/id539979166)

**Features:** macOS Compatibility

**In-app purchases:** none


### KnowTree

[App page](https://appshunter.io/ios/app/knowtree/id6757321205)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowTree Premium | $4.99 | one-time |


## Frequently asked questions

### Is iPemo Lite free?

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

### Is KnowTree free?

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

### Do iPemo Lite or KnowTree have ads?

KnowTree shows ads; iPemo Lite does not.

### Which is updated more often, iPemo Lite or KnowTree?

iPemo Lite ships an update every 68 months, and KnowTree every 9 days. Most recently, iPemo Lite was updated on June 5, 2026 and KnowTree on September 8, 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.*