# RedDot AI vs Sol

The clearest difference is update cadence: RedDot AI at every 10 days against Sol's every 5 weeks. RedDot AI also leads on iOS requirement (14.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RedDot AI sells 4 one-off in-app purchases and Sol sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

RedDot AI ships an update every 10 days, Sol every 5 weeks. The most recent releases landed on October 5, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | RedDot AI | Sol |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 weeks |
| Size | 100 MB | 17 MB |
| Requires iOS | **14.1** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | +4 |
| Developer | [夏棠 吴](https://appshunter.io/developer/1708448128) | [Adam Kovacs](https://appshunter.io/developer/1814096456) |

## What reviewers say

### RedDot AI

[App page](https://appshunter.io/ios/app/reddot-ai/id6766827225)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 120 minute | $2.49 | one-time |
| 600 minute | $9.49 | one-time |
| 3000 minute | $44.99 | one-time |
| 6000 minute | $79.99 | one-time |


### Sol

[App page](https://appshunter.io/ios/app/sol-daily-notes-and-documents/id6792342079)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sol Pro Monthly | $4.99 | per month |
| Sol Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is RedDot AI free?

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

### Is Sol free?

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

### Do RedDot AI or Sol have ads?

Neither RedDot AI nor Sol shows ads.

### Which is updated more often, RedDot AI or Sol?

RedDot AI ships an update every 10 days, and Sol every 5 weeks. Most recently, RedDot AI was updated on October 5, 2026 and Sol on October 20, 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.*