# Notes Book PRO vs Decision IO

Notes Book PRO and Decision IO are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Notes Book PRO sells 9 in-app purchases, starting at $0.49 per month 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.

Notes Book PRO ships an update every 5 weeks, Decision IO monthly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Notes Book PRO | Decision IO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 15 MB | 48 MB |
| Requires iOS | 15.0 | **14.0.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dylan Zaoui](https://appshunter.io/developer/1773873798) | [Altius Opes LLC](https://appshunter.io/developer/1792062188) |

## What reviewers say

### Notes Book PRO

[App page](https://appshunter.io/ios/app/notes-book-pro/id6736923325)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All features for 1 month. | $0.49 | per month |
| All features for 3 months | $0.99 | per 3 months |
| All features for 6 months. | $1.99 | per 6 months |
| Premium access for 1 month | $1.99 | per month |
| All features for 1 year. | $3.99 | per year |
| Premium access for 3 months | $3.99 | per 3 months |
| Premium access for 6 months. | $4.99 | per 6 months |
| Premium access for 12 months | $8.99 | per year |
| All features for life | $3.99 | 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 Notes Book PRO free?

Notes Book PRO 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 Notes Book PRO or Decision IO have ads?

Neither Notes Book PRO nor Decision IO shows ads.

### Which is updated more often, Notes Book PRO or Decision IO?

Notes Book PRO ships an update every 5 weeks, and Decision IO monthly. Most recently, Notes Book PRO was updated on October 25, 2026 and Decision IO on October 28, 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.*