# A vs REDiFly SMS

The clearest difference is update cadence: REDiFly SMS at every 2 months against A's every 56 months. 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.

A ships an update every 56 months, REDiFly SMS every 2 months. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | A | REDiFly SMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 56 months | **Every 2 months** |
| Size | 29 MB | 31 MB |
| Requires iOS | **15.0** | 15.7 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Swedavia AB](https://appshunter.io/developer/416802377) | [Integrated Aviation Systems AG](https://appshunter.io/developer/1449703353) |

## What reviewers say

### A

[App page](https://appshunter.io/ios/app/a-cdm-essa/id1541659289)

**In-app purchases:** none


### REDiFly SMS

[App page](https://appshunter.io/ios/app/redifly-sms/id6476977726)

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

**In-app purchases:** none


## Frequently asked questions

### Is A free?

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

### Is REDiFly SMS free?

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

### Do A or REDiFly SMS have ads?

Neither A nor REDiFly SMS shows ads.

### Which is updated more often, A or REDiFly SMS?

A ships an update every 56 months, and REDiFly SMS every 2 months. Most recently, A was updated on November 3, 2026 and REDiFly SMS on November 8, 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.*