# DEC Opcodes vs Manual Override

The clearest difference is iOS requirement: Manual Override at 15.0 against DEC Opcodes's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. DEC Opcodes sells 1 one-off in-app purchase and Manual Override sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | DEC Opcodes | Manual Override |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/dec-opcodes/id6760246055/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | — |
| Monetization | Free | — |
| Size | 42 MB | 21 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [John Kennedy](https://appshunter.io/developer/284943103) | [吉帅 仇](https://appshunter.io/developer/1087837335) |

## What reviewers say

### DEC Opcodes

[App page](https://appshunter.io/ios/app/dec-opcodes/id6760246055)

Explore the instruction sets of legendary DEC computers like the PDP and VAX. This app provides detailed information on each instruction, historical context, and interactive lessons. Discover the machines that shaped modern computing.

**Highlights:** Instruction set reference, Historical context and photos, System specifications, Interactive assembly lessons, Search and filtering, Customizable themes, Simple assembler

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $0.99 | one-time |


### Manual Override

[App page](https://appshunter.io/ios/app/manual-override-linux-and-sql/id6783660930)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Course Unlock | $1.99 | one-time |


## Frequently asked questions

### Is DEC Opcodes free?

DEC Opcodes is free to download, with in-app purchases available.

### Is Manual Override free?

Manual Override is free to download, with in-app purchases available.

### Do DEC Opcodes or Manual Override have ads?

Neither DEC Opcodes nor Manual Override shows ads.

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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.*