# RubiMask vs Go Clock Duo

The clearest difference is ads: Go Clock Duo at none against RubiMask's shown. RubiMask's advantage is update cadence (every 2 weeks vs every 2 months) and iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. RubiMask sells 3 in-app purchases, starting at $2.99 per month and Go Clock Duo sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

RubiMask ships an update every 2 weeks, Go Clock Duo every 2 months. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | RubiMask | Go Clock Duo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rubimask-book-translator/id6756987331/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 14 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KeiK LLC](https://appshunter.io/developer/1854674572) | [Vincent Grellert](https://appshunter.io/developer/1886984960) |

## What reviewers say

### RubiMask

[App page](https://appshunter.io/ios/app/rubimask-book-translator/id6756987331)

Translate and read aloud text from physical books or documents using your device's camera. Tap any word for instant definitions and meanings within its sentence context. Supports various languages and text formats, including vertical Japanese.

**Highlights:** Live camera translation, Read aloud functionality, Tap-to-define word lookup, Furigana masking for Japanese, PDF and photo text extraction, Export text, PDF, or audio

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RubiMask Premium | $2.99 | per month |
| RubiMask Premium | $11.99 | per year |
| RubiMask Premium | $19.99 | one-time |


### Go Clock Duo

[App page](https://appshunter.io/ios/app/go-clock-duo-byoyomi-timer/id6795444077)

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Yearly | $8.99 | per year |
| Byoyomi Timer Pro | $24.99 | one-time |


## Frequently asked questions

### Is RubiMask free?

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

### Is Go Clock Duo free?

Go Clock Duo is free to download, with in-app purchases available.

### Do RubiMask or Go Clock Duo have ads?

RubiMask shows ads; Go Clock Duo does not.

### Which is updated more often, RubiMask or Go Clock Duo?

RubiMask ships an update every 2 weeks, and Go Clock Duo every 2 months. Most recently, RubiMask was updated on November 9, 2026 and Go Clock Duo on November 10, 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.*