# ETA Smart vs DoAuth

The clearest difference is in-app purchases: ETA Smart at none against DoAuth's 1. ETA Smart also leads on iOS requirement (14.0 vs 17.0). DoAuth's advantage is update cadence (every 2 days vs every 5 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. DoAuth sells 1 in-app purchase, starting at $10.00 per year. ETA Smart asks for nothing beyond the download.

ETA Smart ships an update every 5 months, DoAuth every 2 days. The most recent releases landed on September 27, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ETA Smart | DoAuth |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 190 MB | 8 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ETA a.s.](https://appshunter.io/developer/1480365526) | [Jan Nahly Do](https://appshunter.io/developer/6798403895) |

## What reviewers say

### ETA Smart

[App page](https://appshunter.io/ios/app/eta-smart/id1525697448)

This app connects your smart appliances into a unified smart home system. Control devices remotely, set up automated routines, and receive real-time status updates for enhanced comfort and security.

**Highlights:** Unified device control, Smart scenes and automation, Timers and scheduling, Real-time notifications, Remote access, Home sharing

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

**In-app purchases:** none


### DoAuth

[App page](https://appshunter.io/ios/app/doauth/id6808760897)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DoAuth Annual | $10.00 | per year |


## Frequently asked questions

### Is ETA Smart free?

ETA Smart is free to download, with no in-app purchases.

### Is DoAuth free?

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

### Do ETA Smart or DoAuth have ads?

Neither ETA Smart nor DoAuth shows ads.

### Which is updated more often, ETA Smart or DoAuth?

ETA Smart ships an update every 5 months, and DoAuth every 2 days. Most recently, ETA Smart was updated on September 27, 2026 and DoAuth on October 4, 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.*