# Converter Plus [paid] vs Operational Amplifiers Pro

The clearest difference is ratings volume: Converter Plus [paid] at 202 against Operational Amplifiers Pro's 1. Converter Plus [paid] also leads on price ($1.99 vs $4.99) and iOS requirement (8.0 vs 17.0). Operational Amplifiers Pro's advantage is rating (5.0 vs 4.7). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Converter Plus [paid] costs $1.99 and Operational Amplifiers Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Operational Amplifiers Pro holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Converter Plus [paid] has 202 ratings behind it against 1, so its average is the more settled of the two.

Converter Plus [paid] ships an update every 3 months, Operational Amplifiers Pro every 2 months. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Converter Plus [paid] | Operational Amplifiers Pro |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | [4.7 (202 ratings)](https://appshunter.io/ios/app/converter-plus-paid/id371354978/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/operational-amplifiers-pro/id6467253953/reviews)** |
| Number of ratings | **202** | 1 |
| Positive reviews | 90.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 7 MB | 14 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [TranCreative Software](https://appshunter.io/developer/289694927) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Converter Plus [paid]

[App page](https://appshunter.io/ios/app/converter-plus-paid/id371354978)

This app offers a comprehensive unit and currency converter with a vast array of categories and calculators for everyday financial and scientific needs. It allows users to customize templates, download shared ones, and automatically refreshes currency exchange rates.

**Highlights:** Extensive unit and currency conversion, Multiple calculators (mortgage, loan, tip), Customizable and downloadable templates, Automatic currency exchange rate refresh, Support for compound units, Full text search for categories and units

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Comprehensive conversions
- 💡 Customizable templates
- 🔍 Helpful for travel and daily life
- ⭐ Overall great app

**What reviewers complain about**

- 🐛 Currency rates not updating
- 🐛 Formulas not visible during editing
- 🔍 Lack of developer support and updates
- 🔍 Broken links and permissions errors

**Reported bugs**

- Currency rates not working
- App crashes on launch
- Unable to download templates

**Requested features**

- Improved currency rate updates
- Ability to use Bluetooth keyboard
- More conversion units and categories
- iCloud sync for custom settings


### 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 Converter Plus [paid] free?

Converter Plus [paid] costs $1.99, with no in-app purchases.

### Is Operational Amplifiers Pro free?

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

### Which has better reviews, Converter Plus [paid] or Operational Amplifiers Pro?

Operational Amplifiers Pro is rated higher. Converter Plus [paid] averages 4.7 out of 5 from 202 ratings, while Operational Amplifiers Pro averages 5.0 from 1 ratings.

### Do Converter Plus [paid] or Operational Amplifiers Pro have ads?

Neither Converter Plus [paid] nor Operational Amplifiers Pro shows ads.

### Which is updated more often, Converter Plus [paid] or Operational Amplifiers Pro?

Converter Plus [paid] ships an update every 3 months, and Operational Amplifiers Pro every 2 months. Most recently, Converter Plus [paid] was updated on November 10, 2026 and Operational Amplifiers Pro on November 3, 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.*