# Operational Amplifiers Guide vs DIS Enum

The clearest difference is ads: DIS Enum at none against Operational Amplifiers Guide's shown. Operational Amplifiers Guide's advantage is iOS requirement (16.0 vs 18.6). On price, update cadence, 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.

Operational Amplifiers Guide ships an update every 2 months, DIS Enum every 3 months. The most recent releases landed on September 19, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | Operational Amplifiers Guide | DIS Enum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dis-enum-de-dictionary/id6754333997/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free |
| Size | 17 MB | 71 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Peripheral Pursuit Labs](https://appshunter.io/developer/1847909575) |

## What reviewers say

### Operational Amplifiers Guide

[App page](https://appshunter.io/ios/app/operational-amplifiers-guide/id6467499897)

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

**In-app purchases:** none


### DIS Enum

[App page](https://appshunter.io/ios/app/dis-enum-de-dictionary/id6754333997)

Access comprehensive military simulation protocol data, including detailed platform and munition specifications. This app provides instant lookups for defense simulation professionals, working offline and featuring intelligent search capabilities.

**Highlights:** Complete enumeration database, Platform & munition specifications, Cross-referenced data, Intelligent search, Offline functionality, Clean, professional interface

**In-app purchases:** none


## Frequently asked questions

### Is Operational Amplifiers Guide free?

Operational Amplifiers Guide is free to download, with no in-app purchases.

### Is DIS Enum free?

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

### Do Operational Amplifiers Guide or DIS Enum have ads?

Operational Amplifiers Guide shows ads; DIS Enum does not.

### Which is updated more often, Operational Amplifiers Guide or DIS Enum?

Operational Amplifiers Guide ships an update every 2 months, and DIS Enum every 3 months. Most recently, Operational Amplifiers Guide was updated on September 19, 2026 and DIS Enum on June 8, 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.*