# BookCompass vs Sola.

The clearest difference is in-app purchases: Sola. at none against BookCompass's 1. Sola. also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). BookCompass's advantage is update cadence (every 11 days vs every 2 months). On price and ads there is nothing between them.

Both are free to download. BookCompass sells 1 in-app purchase, starting at $4.99 per month. Sola. asks for nothing beyond the download.

BookCompass ships an update every 11 days, Sola. every 2 months. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BookCompass | Sola. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 months |
| Size | 78 MB | 90 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [naoki shiomichi](https://appshunter.io/developer/1879387430) | [Mewgon](https://appshunter.io/developer/1886086479) |

## What reviewers say

### BookCompass

[App page](https://appshunter.io/ios/app/bookcompass/id6760604663)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Compass Pro | $4.99 | per month |


### Sola.

[App page](https://appshunter.io/ios/app/sola/id6760753726)

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

**In-app purchases:** none


## Frequently asked questions

### Is BookCompass free?

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

### Is Sola. free?

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

### Do BookCompass or Sola. have ads?

Neither BookCompass nor Sola. shows ads.

### Which is updated more often, BookCompass or Sola.?

BookCompass ships an update every 11 days, and Sola. every 2 months. Most recently, BookCompass was updated on October 31, 2026 and Sola. on October 24, 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.*