# Book2App vs Decision IO

The clearest difference is ads: Decision IO at none against Book2App's shown. Decision IO also leads on update cadence (monthly vs every 3 months). Book2App's advantage is iOS requirement (11.0 vs 14.0.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Book2App sells 3 one-off in-app purchases and Decision IO sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Book2App ships an update every 3 months, Decision IO monthly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Book2App | Decision IO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Size | 22 MB | 48 MB |
| Requires iOS | **11.0** | 14.0.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ipsilon Developments Inc](https://appshunter.io/developer/1003755058) | [Altius Opes LLC](https://appshunter.io/developer/1792062188) |

## What reviewers say

### Book2App

[App page](https://appshunter.io/ios/app/book2app/id1488678677)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Credit Recharge | $1.99 | one-time |
| 2 Credits Recharge | $3.99 | one-time |
| 10 Credits Recharge | $19.99 | one-time |


### Decision IO

[App page](https://appshunter.io/ios/app/decision-io/id6740878575)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access - Monthly | $7.99 | per month |
| Pro Access - Yearly | $59.99 | per year |


## Frequently asked questions

### Is Book2App free?

Book2App is free to download, with in-app purchases available.

### Is Decision IO free?

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

### Do Book2App or Decision IO have ads?

Book2App shows ads; Decision IO does not.

### Which is updated more often, Book2App or Decision IO?

Book2App ships an update every 3 months, and Decision IO monthly. Most recently, Book2App was updated on November 7, 2026 and Decision IO on October 30, 2026.

---

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