# Engine Miles vs OS Translator

The clearest difference is ads: Engine Miles at none against OS Translator's shown. Engine Miles also leads on update cadence (every 3 days vs every 8 days) and iOS requirement (17.0 vs 27.0). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Engine Miles sells 3 in-app purchases, starting at $2.99 per month and OS Translator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Engine Miles against 5.0 for OS Translator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Engine Miles ships an update every 3 days, OS Translator every 8 days. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Engine Miles | OS Translator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/engine-miles-hybrid-tracker/id6819898617/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/os-translator-live-screen/id6820988446/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 8 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 32 MB | 13 MB |
| Requires iOS | **17.0** | 27.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [TooAvid Technologies LLC](https://appshunter.io/developer/6819898619) | [Sunghyun Kim](https://appshunter.io/developer/1851774589) |

## What reviewers say

### Engine Miles

[App page](https://appshunter.io/ios/app/engine-miles-hybrid-tracker/id6819898617)

This app helps hybrid and plug-in hybrid vehicle owners track their gasoline engine mileage. It logs fuel fill-ups and estimates engine usage for maintenance reminders. Pro features offer advanced insights, multiple vehicle support, and data export.

**Highlights:** Estimate gasoline engine mileage, Log fuel fill-ups, Oil change reminders, Track multiple vehicles (Pro), Fuel use and cost insights (Pro), Gas vs. electric mileage split (Pro), CSV import/export (Pro)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EngineMiles Pro Monthly | $2.99 | per month |
| EngineMiles Pro Yearly | $19.99 | per year |
| EngineMiles Pro Lifetime | $29.99 | one-time |


### OS Translator

[App page](https://appshunter.io/ios/app/os-translator-live-screen/id6820988446)

Instantly translate text on your screen while using other apps. It supports games, comics, and online shops, displaying translations in a Picture in Picture window. Choose between mirroring the original text or viewing translations as a list.

**Highlights:** Live on-screen translation, Picture in Picture window, Mirror mode for text overlay, Subtitles mode for dialogue lists, Offline translation support, Supports 20 languages

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Engine Miles free?

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

### Is OS Translator free?

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

### Which has better reviews, Engine Miles or OS Translator?

Engine Miles and OS Translator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Engine Miles or OS Translator have ads?

OS Translator shows ads; Engine Miles does not.

### Which is updated more often, Engine Miles or OS Translator?

Engine Miles ships an update every 3 days, and OS Translator every 8 days. Most recently, Engine Miles was updated on November 10, 2026 and OS Translator on November 6, 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.*