# DeltaClock vs Sol Clock

The clearest difference is iOS requirement: DeltaClock at 18.0 against Sol Clock's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. DeltaClock sells 3 in-app purchases, starting at $1.99 per month and Sol Clock sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | DeltaClock | Sol Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Size | 24 MB | 8 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ameliia Shekikhacheva](https://appshunter.io/developer/1833150935) | [Mark Zigadlo](https://appshunter.io/developer/1879779038) |

## What reviewers say

### DeltaClock

[App page](https://appshunter.io/ios/app/deltaclock-time-zone-planner/id6751021160)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Subscription Monthly | $1.99 | per month |
| Pro Subscription Annual | $9.99 | per year |
| Lifetime purchase | $24.99 | one-time |


### 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 |


## Frequently asked questions

### Is DeltaClock free?

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

### Is Sol Clock free?

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

### Do DeltaClock or Sol Clock have ads?

Neither DeltaClock nor Sol Clock shows ads.

### Which is updated more often, DeltaClock or Sol Clock?

DeltaClock ships an update every 4 days, and Sol Clock every 4 days. Most recently, DeltaClock was updated on October 10, 2026 and Sol Clock on October 15, 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.*