# 2nd Calc vs Simple Unit Convert Pro

The clearest difference is update cadence: Simple Unit Convert Pro at every 2 months against 2nd Calc's every 6 months. 2nd Calc's advantage is iOS requirement (12.0 vs 15.1). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 2nd Calc against 5.0 for Simple Unit Convert Pro. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

2nd Calc ships an update every 6 months, Simple Unit Convert Pro every 2 months. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 2nd Calc | Simple Unit Convert Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/2nd-calc-tips-temps-times/id6460259004/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/simple-unit-convert-pro/id6477877519/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 41 MB | 27 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Scott Kier](https://appshunter.io/developer/1590432802) | [Annika Gadman](https://appshunter.io/developer/1728509902) |

## What reviewers say

### 2nd Calc

[App page](https://appshunter.io/ios/app/2nd-calc-tips-temps-times/id6460259004)

This utility app simplifies everyday calculations with a tip calculator, temperature and unit converters, a real-time currency converter, and a multi-city time zone display. It aims to be your go-to tool for common daily tasks, keeping complex calculators for specialized needs.

**Highlights:** Tip calculator, Temperature conversion (F/C), Unit converter (distance/weight), Real-time currency converter, Multi-city time zone display

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Unit Convert Pro

[App page](https://appshunter.io/ios/app/simple-unit-convert-pro/id6477877519)

This utility app offers a comprehensive solution for converting various units of measurement. It simplifies daily tasks by providing precise conversions for temperature, speed, distance, weight, volume, and area. Streamline your needs with this user-friendly converter.

**Highlights:** Temperature conversion (Fahrenheit/Celsius), Speed conversion (mph/kph), Distance conversion (miles/kilometers), Weight conversion (lbs/oz/kg), Volume conversion (cups/ml/gallons), Area conversion (sq ft/sq m)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 2nd Calc free?

2nd Calc is free to download, with no in-app purchases.

### Is Simple Unit Convert Pro free?

Simple Unit Convert Pro is free to download, with no in-app purchases.

### Which has better reviews, 2nd Calc or Simple Unit Convert Pro?

2nd Calc and Simple Unit Convert Pro are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do 2nd Calc or Simple Unit Convert Pro have ads?

Neither 2nd Calc nor Simple Unit Convert Pro shows ads.

### Which is updated more often, 2nd Calc or Simple Unit Convert Pro?

2nd Calc ships an update every 6 months, and Simple Unit Convert Pro every 2 months. Most recently, 2nd Calc was updated on June 1, 2026 and Simple Unit Convert Pro on September 9, 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.*