# SDF vs Crisol UATRE

The clearest difference is update cadence: Crisol UATRE at every 2 months against SDF's every 4 months. SDF's advantage is iOS requirement (15.1 vs 17.6). 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.

SDF ships an update every 4 months, Crisol UATRE every 2 months. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SDF | Crisol UATRE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 42 MB | 7 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Colegio de Escribanos de la Ciudad de Buenos Aires](https://appshunter.io/developer/1185879051) | [Jph Lions](https://appshunter.io/developer/1446485132) |

## What reviewers say

### SDF

[App page](https://appshunter.io/ios/app/sdf/id6747388469)

**In-app purchases:** none


### Crisol UATRE

[App page](https://appshunter.io/ios/app/crisol-uatre/id6759465514)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SDF free?

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

### Is Crisol UATRE free?

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

### Do SDF or Crisol UATRE have ads?

Neither SDF nor Crisol UATRE shows ads.

### Which is updated more often, SDF or Crisol UATRE?

SDF ships an update every 4 months, and Crisol UATRE every 2 months. Most recently, SDF was updated on October 17, 2026 and Crisol UATRE on October 24, 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.*