# CPC Theory vs Instrument Tech School

The clearest difference is price: Instrument Tech School at Free against CPC Theory's $3.99. Instrument Tech School also leads on update cadence (fortnightly vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Instrument Tech School is free to download; CPC Theory costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CPC Theory ships an update monthly, Instrument Tech School fortnightly. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CPC Theory | Instrument Tech School |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Paid | — |
| Size | 4 MB | 46 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [James Kelly](https://appshunter.io/developer/825582894) | [Javier Zuazua](https://appshunter.io/developer/1782023473) |

## What reviewers say

### CPC Theory

[App page](https://appshunter.io/ios/app/cpc-theory/id960072930)

Prepare for your CPC Theory exam with up-to-date multiple-choice questions. Configure test settings, review incorrect answers, and track your progress to improve your score. This app focuses on the 100-question multiple-choice section.

**Highlights:** Up-to-date questions, Configurable test settings, Review wrong answers, Track quiz scores, Revision mode

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

**In-app purchases:** none


### Instrument Tech School

[App page](https://appshunter.io/ios/app/instrument-tech-school/id6738712153)

**In-app purchases:** none


## Frequently asked questions

### Is CPC Theory free?

CPC Theory costs $3.99, with no in-app purchases.

### Is Instrument Tech School free?

Instrument Tech School is free to download, with no in-app purchases.

### Do CPC Theory or Instrument Tech School have ads?

Neither CPC Theory nor Instrument Tech School shows ads.

### Which is updated more often, CPC Theory or Instrument Tech School?

CPC Theory ships an update monthly, and Instrument Tech School fortnightly. Most recently, CPC Theory was updated on October 19, 2026 and Instrument Tech School 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.*