# Lean Work Sampling vs C/T Pro by Kukiz

The clearest difference is update cadence: C/T Pro by Kukiz at every 2 weeks against Lean Work Sampling's every 3 months. Lean Work Sampling's advantage is iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Lean Work Sampling sells 2 one-off in-app purchases and C/T Pro by Kukiz sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Lean Work Sampling ships an update every 3 months, C/T Pro by Kukiz every 2 weeks. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Lean Work Sampling | C/T Pro by Kukiz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 5 MB | 6 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Herve Kasparian](https://appshunter.io/developer/1232851521) | [Krzysztof Kukiz](https://appshunter.io/developer/1597135082) |

## 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 |


### C/T Pro by Kukiz

[App page](https://appshunter.io/ios/app/ct-pro-by-kukiz/id6630380237)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $7.99 | per month |
| Pro Access | $79.99 | per year |


## Frequently asked questions

### Is Lean Work Sampling free?

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

### Is C/T Pro by Kukiz free?

C/T Pro by Kukiz is free to download, with in-app purchases available.

### Do Lean Work Sampling or C/T Pro by Kukiz have ads?

Neither Lean Work Sampling nor C/T Pro by Kukiz shows ads.

### Which is updated more often, Lean Work Sampling or C/T Pro by Kukiz?

Lean Work Sampling ships an update every 3 months, and C/T Pro by Kukiz every 2 weeks. Most recently, Lean Work Sampling was updated on October 9, 2026 and C/T Pro by Kukiz on October 5, 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.*