# English Plus One vs DeltaBook

The clearest difference is in-app purchases: English Plus One at none against DeltaBook's 1. DeltaBook's advantage is update cadence (weekly vs monthly) and iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. DeltaBook sells 1 in-app purchase, starting at $11.99 per month. English Plus One asks for nothing beyond the download.

English Plus One ships an update monthly, DeltaBook weekly. The most recent releases landed on October 11, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | English Plus One | DeltaBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 42 MB | 57 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [chengche lee](https://appshunter.io/developer/1862790313) | [Adam Weaver](https://appshunter.io/developer/1728008045) |

## What reviewers say

### English Plus One

[App page](https://appshunter.io/ios/app/english-plus-one/id6757358263)

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

**In-app purchases:** none


### DeltaBook

[App page](https://appshunter.io/ios/app/deltabook/id6762256857)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Access | $11.99 | per month |


## Frequently asked questions

### Is English Plus One free?

English Plus One is free to download, with no in-app purchases.

### Is DeltaBook free?

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

### Do English Plus One or DeltaBook have ads?

Neither English Plus One nor DeltaBook shows ads.

### Which is updated more often, English Plus One or DeltaBook?

English Plus One ships an update monthly, and DeltaBook weekly. Most recently, English Plus One was updated on October 11, 2026 and DeltaBook on October 17, 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.*