# hearSafe vs GSL Smart ESS

The clearest difference is update cadence: hearSafe at every 3 months against GSL Smart ESS's every 9 months. hearSafe also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

hearSafe ships an update every 3 months, GSL Smart ESS every 9 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | hearSafe | GSL Smart ESS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Size | 30 MB | 37 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ZERO PLUS, K.K.](https://appshunter.io/developer/1536723252) | [SHENZHEN GSL ENERGY CO LTD](https://appshunter.io/developer/1873857076) |

## What reviewers say

### hearSafe

[App page](https://appshunter.io/ios/app/hearsafe/id6476250215)

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

**In-app purchases:** none


### GSL Smart ESS

[App page](https://appshunter.io/ios/app/gsl-smart-ess/id6504597237)

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

**In-app purchases:** none


## Frequently asked questions

### Is hearSafe free?

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

### Is GSL Smart ESS free?

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

### Do hearSafe or GSL Smart ESS have ads?

Neither hearSafe nor GSL Smart ESS shows ads.

### Which is updated more often, hearSafe or GSL Smart ESS?

hearSafe ships an update every 3 months, and GSL Smart ESS every 9 months. Most recently, hearSafe was updated on October 25, 2026 and GSL Smart ESS on October 25, 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.*