# SIDA Tools vs ACI Sign OTP

The clearest difference is update cadence: SIDA Tools at every 5 weeks against ACI Sign OTP's every 12 months. ACI Sign OTP's advantage is iOS requirement (13.0 vs 16.6). 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.

SIDA Tools ships an update every 5 weeks, ACI Sign OTP every 12 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SIDA Tools | ACI Sign OTP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 12 months |
| Size | 19 MB | 8 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Autosoft Multimedia srl](https://appshunter.io/developer/784464890) | [ACI Informatica S.p.A.](https://appshunter.io/developer/408680677) |

## What reviewers say

### SIDA Tools

[App page](https://appshunter.io/ios/app/sida-tools/id1486291099)

**Features:** macOS Compatibility

**In-app purchases:** none


### ACI Sign OTP

[App page](https://appshunter.io/ios/app/aci-sign-otp/id1626986472)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SIDA Tools free?

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

### Is ACI Sign OTP free?

ACI Sign OTP is free to download, with no in-app purchases.

### Do SIDA Tools or ACI Sign OTP have ads?

Neither SIDA Tools nor ACI Sign OTP shows ads.

### Which is updated more often, SIDA Tools or ACI Sign OTP?

SIDA Tools ships an update every 5 weeks, and ACI Sign OTP every 12 months. Most recently, SIDA Tools was updated on November 3, 2026 and ACI Sign OTP 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.*