# Alliance Dictionary vs CompTIA CASP+ Prep

The clearest difference is in-app purchases: Alliance Dictionary at none against CompTIA CASP+ Prep's 3. Alliance Dictionary also leads on update cadence (monthly vs every 4 months). CompTIA CASP+ Prep's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. CompTIA CASP+ Prep sells 3 in-app purchases, starting at $4.99 per month. Alliance Dictionary asks for nothing beyond the download.

Alliance Dictionary ships an update monthly, CompTIA CASP+ Prep every 4 months. The most recent releases landed on October 27, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Alliance Dictionary | CompTIA CASP+ Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 4 MB | 58 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Doy Kim](https://appshunter.io/developer/1640992617) | [学勇 张](https://appshunter.io/developer/590340880) |

## What reviewers say

### Alliance Dictionary

[App page](https://appshunter.io/ios/app/alliance-dictionary/id1640992615)

**Features:** macOS Compatibility

**In-app purchases:** none


### CompTIA CASP+ Prep

[App page](https://appshunter.io/ios/app/comptia-casp-plus-prep/id6479339955)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MONTHLY | $4.99 | per month |
| 3 MONTHS | $9.99 | per 3 months |
| YEARLY | $19.99 | per year |


## Frequently asked questions

### Is Alliance Dictionary free?

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

### Is CompTIA CASP+ Prep free?

CompTIA CASP+ Prep is free to download, with in-app purchases available.

### Do Alliance Dictionary or CompTIA CASP+ Prep have ads?

Neither Alliance Dictionary nor CompTIA CASP+ Prep shows ads.

### Which is updated more often, Alliance Dictionary or CompTIA CASP+ Prep?

Alliance Dictionary ships an update monthly, and CompTIA CASP+ Prep every 4 months. Most recently, Alliance Dictionary was updated on October 27, 2026 and CompTIA CASP+ Prep on September 9, 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.*