# TodoKnock vs VisibleHour

The clearest difference is price: TodoKnock at Free against VisibleHour's $4.99. TodoKnock also leads on update cadence (every 6 days vs every 3 months) and iOS requirement (16.6 vs 18.0). VisibleHour's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On ads there is nothing between them.

TodoKnock is free to download; VisibleHour costs $4.99 up front. TodoKnock sells 1 one-off in-app purchase. VisibleHour asks for nothing beyond the download.

TodoKnock ships an update every 6 days, VisibleHour every 3 months. Both last shipped on October 28, 2026.

## The numbers

| Metric | TodoKnock | VisibleHour |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 months |
| Size | 56 MB | 8 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Yuichi Sasaki](https://appshunter.io/developer/1831654051) | [sthreelabs LLC](https://appshunter.io/developer/1894734556) |

## What reviewers say

### TodoKnock

[App page](https://appshunter.io/ios/app/todoknock-count-your-progress/id6755919383)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### VisibleHour

[App page](https://appshunter.io/ios/app/visiblehour/id6766649576)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is TodoKnock free?

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

### Is VisibleHour free?

VisibleHour costs $4.99, with no in-app purchases.

### Do TodoKnock or VisibleHour have ads?

Neither TodoKnock nor VisibleHour shows ads.

### Which is updated more often, TodoKnock or VisibleHour?

TodoKnock ships an update every 6 days, and VisibleHour every 3 months. Most recently, TodoKnock was updated on October 28, 2026 and VisibleHour on October 28, 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.*