# Serenity vs Bat Test

The clearest difference is update cadence: Bat Test at every 2 weeks against Serenity's monthly. Serenity's advantage is iOS requirement (9.0 vs 13.0). 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.

Serenity ships an update monthly, Bat Test every 2 weeks. The most recent releases landed on September 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Serenity | Bat Test |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 158 MB | 13 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Avosdim](https://appshunter.io/developer/1352845967) | [Shenzhen Grepow Battery Co.Ltd.](https://appshunter.io/developer/1714028930) |

## What reviewers say

### Serenity

[App page](https://appshunter.io/ios/app/serenity/id1352845968)

Control your Avosdim Serenity alarm system remotely. Arm, disarm, program settings, add accessories, and manage alerts and user access from a simple interface.

**Highlights:** Remote alarm control, Arm and disarm system, Program settings, Add accessories, Manage alerts, User access management

**Features:** macOS Compatibility

**In-app purchases:** none


### Bat Test

[App page](https://appshunter.io/ios/app/bat-test/id6477124171)

**In-app purchases:** none


## Frequently asked questions

### Is Serenity free?

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

### Is Bat Test free?

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

### Do Serenity or Bat Test have ads?

Neither Serenity nor Bat Test shows ads.

### Which is updated more often, Serenity or Bat Test?

Serenity ships an update monthly, and Bat Test every 2 weeks. Most recently, Serenity was updated on September 24, 2026 and Bat Test on October 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.*