# DA40 M&B mobile vs Operational Amplifiers Pro

The clearest difference is price: DA40 M&B mobile at $1.99 against Operational Amplifiers Pro's $4.99. DA40 M&B mobile also leads on chart position (#194 vs unranked). Operational Amplifiers Pro's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

DA40 M&B mobile costs $1.99 and Operational Amplifiers Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DA40 M&B mobile ships an update every 3 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on October 30, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | DA40 M&B mobile | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Paid |
| Best chart rank | **#194** | — |
| Size | 8 MB | 14 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Pedro Isidoro](https://appshunter.io/developer/1506809339) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### DA40 M&B mobile

[App page](https://appshunter.io/ios/app/da40-m-and-b-mobile/id1586440182)

**Currently charting:** #194 Top Paid · Utilities (US App Store)

**Features:** Vision Pro support

**In-app purchases:** none


### Operational Amplifiers Pro

[App page](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953)

This app provides interactive calculators and reference information for designing and analyzing op-amp circuits. It offers step-by-step explanations and technical data on popular op-amp series, aiding students and engineers in circuit development and prototyping.

**Highlights:** Interactive op-amp circuit calculators, Step-by-step explanations and formulas, Reference data on op-amps and comparators, Support for 14 languages, Light and dark mode, Advanced calculators and circuit guides (Pro), Full-text search (Pro)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DA40 M&B mobile free?

DA40 M&B mobile costs $1.99, with no in-app purchases.

### Is Operational Amplifiers Pro free?

Operational Amplifiers Pro costs $4.99, with no in-app purchases.

### Do DA40 M&B mobile or Operational Amplifiers Pro have ads?

Neither DA40 M&B mobile nor Operational Amplifiers Pro shows ads.

### Which is updated more often, DA40 M&B mobile or Operational Amplifiers Pro?

DA40 M&B mobile ships an update every 3 months, and Operational Amplifiers Pro every 2 months. Most recently, DA40 M&B mobile was updated on October 30, 2026 and Operational Amplifiers Pro on October 19, 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.*