# Sol Clock vs ADHD Calendar

The clearest difference is in-app purchases: ADHD Calendar at none against Sol Clock's 2. ADHD Calendar also leads on iOS requirement (15.1 vs 26.0). Sol Clock's advantage is ads (none vs shown) and update cadence (every 4 days vs monthly). On price and device support there is nothing between them.

Both are free to download. Sol Clock sells 2 in-app purchases, starting at $0.99 per month. ADHD Calendar asks for nothing beyond the download.

Sol Clock ships an update every 4 days, ADHD Calendar monthly. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Sol Clock | ADHD Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Monthly |
| Size | 8 MB | 54 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mark Zigadlo](https://appshunter.io/developer/1879779038) | [Bohdan Kvetka](https://appshunter.io/developer/1895123189) |

## What reviewers say

### Sol Clock

[App page](https://appshunter.io/ios/app/sol-clock/id6770347619)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Annual | $7.99 | per year |


### ADHD Calendar

[App page](https://appshunter.io/ios/app/adhd-calendar-fast-and-fun/id6792322212)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sol Clock free?

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

### Is ADHD Calendar free?

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

### Do Sol Clock or ADHD Calendar have ads?

ADHD Calendar shows ads; Sol Clock does not.

### Which is updated more often, Sol Clock or ADHD Calendar?

Sol Clock ships an update every 4 days, and ADHD Calendar monthly. Most recently, Sol Clock was updated on October 24, 2026 and ADHD Calendar on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*