# OPE.AI vs InkBrook

The clearest difference is device support: OPE.AI at 3 against InkBrook's 1. OPE.AI also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. OPE.AI sells 2 one-off in-app purchases and InkBrook sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

OPE.AI ships an update every 2 weeks, InkBrook every 3 weeks. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | OPE.AI | InkBrook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 98 MB | 21 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [IRUKA K.K.](https://appshunter.io/developer/1774648665) | [Dalian Junjing Xiyu Technology Co., Ltd.](https://appshunter.io/developer/6784915710) |

## What reviewers say

### OPE.AI

[App page](https://appshunter.io/ios/app/opeai/id6737112669)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OPEポイント | $0.99 | one-time |
| OPE points | $30.00 | one-time |


### InkBrook

[App page](https://appshunter.io/ios/app/inkbrook/id6784915708)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 完整版 · 月 | $0.99 | per month |
| 完整版 · 年 | $4.99 | per year |


## Frequently asked questions

### Is OPE.AI free?

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

### Is InkBrook free?

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

### Do OPE.AI or InkBrook have ads?

Neither OPE.AI nor InkBrook shows ads.

### Which is updated more often, OPE.AI or InkBrook?

OPE.AI ships an update every 2 weeks, and InkBrook every 3 weeks. Most recently, OPE.AI was updated on October 10, 2026 and InkBrook on September 30, 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.*