# Reader by Sol vs Stacks Books

The clearest difference is in-app purchases: Stacks Books at none against Reader by Sol's 18. Stacks Books also leads on update cadence (every 6 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Reader by Sol sells 18 in-app purchases, starting at $14.99 per month. Stacks Books asks for nothing beyond the download.

Reader by Sol ships an update fortnightly, Stacks Books every 6 days. The most recent releases landed on September 23, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Reader by Sol | Stacks Books |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (13 ratings)](https://appshunter.io/ios/app/reader-by-sol/id6443714688/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 97 MB | 3 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Sindarin, Inc.](https://appshunter.io/developer/1565695400) | [STEPHEN REY MORENO](https://appshunter.io/developer/1894086556) |

## What reviewers say

### Reader by Sol

[App page](https://appshunter.io/ios/app/reader-by-sol/id6443714688)

This app delivers new books, articles, and newsletters to your digital library. It also allows you to archive content and access settings, accounts, and support in a centralized location.

**Highlights:** Content delivery, Book archiving, Article management, Newsletter access, Settings hub, Account management, Tech support access

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Beta Book Club | $14.99 | per month |
| $0.99 | $0.99 | one-time |
| $1.99 | $1.99 | one-time |
| Sol Catalog Book | $1.99 | one-time |
| $3.99 | $3.99 | one-time |
| $5.99 | $5.99 | one-time |
| $6.99 | $6.99 | one-time |
| $10.99 | $10.99 | one-time |
| $11.99 | $11.99 | one-time |
| $12.99 | $12.99 | one-time |
| $15.99 | $15.99 | one-time |
| $19.99 | $19.99 | one-time |
| $21.99 | $21.99 | one-time |
| $25.99 | $25.99 | one-time |
| $39.99 | $39.99 | one-time |
| $44.99 | $44.99 | one-time |
| $79.99 | $79.99 | one-time |
| $99.99 | $99.99 | one-time |


### Stacks Books

[App page](https://appshunter.io/ios/app/stacks-books/id6762415615)

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

**In-app purchases:** none


## Frequently asked questions

### Is Reader by Sol free?

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

### Is Stacks Books free?

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

### Do Reader by Sol or Stacks Books have ads?

Neither Reader by Sol nor Stacks Books shows ads.

### Which is updated more often, Reader by Sol or Stacks Books?

Reader by Sol ships an update fortnightly, and Stacks Books every 6 days. Most recently, Reader by Sol was updated on September 23, 2026 and Stacks Books 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.*