# Lean Work Sampling vs oee.ai

The clearest difference is in-app purchases: oee.ai at none against Lean Work Sampling's 2. oee.ai also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Lean Work Sampling sells 2 one-off in-app purchases. oee.ai asks for nothing beyond the download.

Lean Work Sampling ships an update every 3 months, oee.ai every 2 months. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Lean Work Sampling | oee.ai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 5 MB | 23 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Herve Kasparian](https://appshunter.io/developer/1232851521) | [ifp Software GmbH](https://appshunter.io/developer/1747927708) |

## What reviewers say

### Lean Work Sampling

[App page](https://appshunter.io/ios/app/lean-work-sampling-lean-tool/id1256690217)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Large Tip | $7.99 | one-time |


### oee.ai

[App page](https://appshunter.io/ios/app/oeeai/id6503070126)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lean Work Sampling free?

Lean Work Sampling is free to download, with in-app purchases available.

### Is oee.ai free?

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

### Do Lean Work Sampling or oee.ai have ads?

Neither Lean Work Sampling nor oee.ai shows ads.

### Which is updated more often, Lean Work Sampling or oee.ai?

Lean Work Sampling ships an update every 3 months, and oee.ai every 2 months. Most recently, Lean Work Sampling was updated on September 22, 2026 and oee.ai on September 21, 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.*