# DifCal vs CTIA Threat Intelligence Prep

The clearest difference is update cadence: CTIA Threat Intelligence Prep at every 4 months against DifCal's every 15 months. DifCal's advantage is iOS requirement (12.0 vs 15.0). 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.

DifCal ships an update every 15 months, CTIA Threat Intelligence Prep every 4 months. The most recent releases landed on October 10, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | DifCal | CTIA Threat Intelligence Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 months** |
| Size | 9 MB | 26 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sean Brennan](https://appshunter.io/developer/898026482) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### DifCal

[App page](https://appshunter.io/ios/app/difcal/id898026479)

**Features:** Vision Pro support

**In-app purchases:** none


### CTIA Threat Intelligence Prep

[App page](https://appshunter.io/ios/app/ctia-threat-intelligence-prep/id6758308548)

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

**In-app purchases:** none


## Frequently asked questions

### Is DifCal free?

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

### Is CTIA Threat Intelligence Prep free?

CTIA Threat Intelligence Prep is free to download, with no in-app purchases.

### Do DifCal or CTIA Threat Intelligence Prep have ads?

Neither DifCal nor CTIA Threat Intelligence Prep shows ads.

### Which is updated more often, DifCal or CTIA Threat Intelligence Prep?

DifCal ships an update every 15 months, and CTIA Threat Intelligence Prep every 4 months. Most recently, DifCal was updated on October 10, 2026 and CTIA Threat Intelligence Prep on October 19, 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.*