# Kazzi Alert Plus vs RelaySMS

The clearest difference is update cadence: RelaySMS at weekly against Kazzi Alert Plus's every 21 months. Kazzi Alert Plus's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Kazzi Alert Plus ships an update every 21 months, RelaySMS weekly. Both last shipped on October 27, 2026.

## The numbers

| Metric | Kazzi Alert Plus | RelaySMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Weekly** |
| Size | 174 MB | 34 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kazzicom](https://appshunter.io/developer/1210329874) | [Afkanerd Information Technologies Ltd](https://appshunter.io/developer/1651366919) |

## What reviewers say

### Kazzi Alert Plus

[App page](https://appshunter.io/ios/app/kazzi-alert-plus/id6446212325)

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

**In-app purchases:** none


### RelaySMS

[App page](https://appshunter.io/ios/app/relaysms/id6630382970)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kazzi Alert Plus free?

Kazzi Alert Plus is free to download, with no in-app purchases.

### Is RelaySMS free?

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

### Do Kazzi Alert Plus or RelaySMS have ads?

Neither Kazzi Alert Plus nor RelaySMS shows ads.

### Which is updated more often, Kazzi Alert Plus or RelaySMS?

Kazzi Alert Plus ships an update every 21 months, and RelaySMS weekly. Most recently, Kazzi Alert Plus was updated on October 27, 2026 and RelaySMS on October 27, 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.*