# Piek vs Lean Theory

Piek and Lean Theory are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Piek | Lean Theory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Size | 53 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [亚威 王](https://appshunter.io/developer/1564847424) | [志伟 黄](https://appshunter.io/developer/1846005182) |

## What reviewers say

### Piek

[App page](https://appshunter.io/ios/app/piek-hrv/id1565098486)

**In-app purchases:** none


### Lean Theory

[App page](https://appshunter.io/ios/app/lean-theory/id6824081214)

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

**In-app purchases:** none


## Frequently asked questions

### Is Piek free?

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

### Is Lean Theory free?

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

### Do Piek or Lean Theory have ads?

Neither Piek nor Lean Theory 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.*