# SubMed vs ReadLang WatchLang

The clearest difference is in-app purchases: ReadLang WatchLang at none against SubMed's 2. SubMed's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. SubMed sells 2 in-app purchases, starting at $0.99 per month. ReadLang WatchLang asks for nothing beyond the download.

SubMed ships an update monthly, ReadLang WatchLang every 2 weeks. The most recent releases landed on September 30, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | SubMed | ReadLang WatchLang |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (64 ratings)](https://appshunter.io/ios/app/readlang-watchlang/id1602114377/reviews)** |
| Number of ratings | — | **64** |
| Positive reviews | — | 64.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 27 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tuan Duong](https://appshunter.io/developer/787874021) | [Nguyen Hong Phuc](https://appshunter.io/developer/1519084763) |

## What reviewers say

### SubMed

[App page](https://appshunter.io/ios/app/submed/id1585534549)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription. | $0.99 | per month |
| Yearly subscription. | $9.99 | per year |


### ReadLang WatchLang

[App page](https://appshunter.io/ios/app/readlang-watchlang/id1602114377)

Learn languages by translating words and phrases on any webpage or YouTube video with dual subtitles. Practice vocabulary in context and improve listening skills with native pronunciations.

**Highlights:** Translate words and phrases on any webpage, YouTube dual subtitle player, Learn over 100 languages, Practice vocabulary in context, Listen to native pronunciations

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

**In-app purchases:** none


## Frequently asked questions

### Is SubMed free?

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

### Is ReadLang WatchLang free?

ReadLang WatchLang is free to download, with no in-app purchases.

### Do SubMed or ReadLang WatchLang have ads?

ReadLang WatchLang shows ads; SubMed does not.

### Which is updated more often, SubMed or ReadLang WatchLang?

SubMed ships an update monthly, and ReadLang WatchLang every 2 weeks. Most recently, SubMed was updated on September 30, 2026 and ReadLang WatchLang on October 21, 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.*