# GO2 Alarm vs KL500A

The clearest difference is update cadence: KL500A at every 4 weeks against GO2 Alarm's every 2 months. GO2 Alarm's advantage is iOS requirement (7.0 vs 11.0). 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.

GO2 Alarm ships an update every 2 months, KL500A every 4 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | GO2 Alarm | KL500A |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Size | 79 MB | 31 MB |
| Requires iOS | **7.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Chuango Security Technology Corporation](https://appshunter.io/developer/534068551) | [磊磊 周](https://appshunter.io/developer/1708841052) |

## What reviewers say

### GO2 Alarm

[App page](https://appshunter.io/ios/app/go2-alarm/id950220556)

**In-app purchases:** none


### KL500A

[App page](https://appshunter.io/ios/app/kl500a/id6470735168)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GO2 Alarm free?

GO2 Alarm is free to download, with no in-app purchases.

### Is KL500A free?

KL500A is free to download, with no in-app purchases.

### Do GO2 Alarm or KL500A have ads?

Neither GO2 Alarm nor KL500A shows ads.

### Which is updated more often, GO2 Alarm or KL500A?

GO2 Alarm ships an update every 2 months, and KL500A every 4 weeks. Most recently, GO2 Alarm was updated on November 1, 2026 and KL500A on November 3, 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.*