# Opamp tools vs EDoctronics

The clearest difference is in-app purchases: EDoctronics at none against Opamp tools's 1. EDoctronics also leads on update cadence (every 3 weeks vs every 12 months). Opamp tools's advantage is ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Opamp tools sells 1 one-off in-app purchase. EDoctronics asks for nothing beyond the download.

Opamp tools ships an update every 12 months, EDoctronics every 3 weeks. The most recent releases landed on May 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Opamp tools | EDoctronics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 3 weeks** |
| Size | 4 MB | 5 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Jonathan Abimael Cruz Orozco](https://appshunter.io/developer/1111055904) |

## What reviewers say

### Opamp tools

[App page](https://appshunter.io/ios/app/opamp-tools/id1616271826)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $1.99 | one-time |


### EDoctronics

[App page](https://appshunter.io/ios/app/edoctronics/id6752360310)

**In-app purchases:** none


## Frequently asked questions

### Is Opamp tools free?

Opamp tools is free to download, with in-app purchases available.

### Is EDoctronics free?

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

### Do Opamp tools or EDoctronics have ads?

EDoctronics shows ads; Opamp tools does not.

### Which is updated more often, Opamp tools or EDoctronics?

Opamp tools ships an update every 12 months, and EDoctronics every 3 weeks. Most recently, Opamp tools was updated on May 16, 2026 and EDoctronics on September 10, 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.*