# Mamma Balance vs UnitConverter byNSDev

The clearest difference is price: UnitConverter byNSDev at Free against Mamma Balance's $9.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

UnitConverter byNSDev is free to download; Mamma Balance costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mamma Balance ships an update every 6 months, UnitConverter byNSDev every 5 months. The most recent releases landed on August 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Mamma Balance | UnitConverter byNSDev |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 4 MB | 4 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Medic Engineering K.K.](https://appshunter.io/developer/917118875) | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) |

## What reviewers say

### Mamma Balance

[App page](https://appshunter.io/ios/app/mamma-balance/id979096929)

**In-app purchases:** none


### UnitConverter byNSDev

[App page](https://appshunter.io/ios/app/unitconverter-bynsdev/id1229121492)

This tool converts between 26 different types of units, displaying conversion rates and allowing you to specify decimal places. It supports a vast array of units across categories like length, mass, volume, and more.

**Highlights:** Converts 26 types of units, Displays conversion rates, Customizable decimal places, Supports numerous units in various categories, User-submitted unit requests

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

**In-app purchases:** none


## Frequently asked questions

### Is Mamma Balance free?

Mamma Balance costs $9.99, with no in-app purchases.

### Is UnitConverter byNSDev free?

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

### Do Mamma Balance or UnitConverter byNSDev have ads?

Neither Mamma Balance nor UnitConverter byNSDev shows ads.

### Which is updated more often, Mamma Balance or UnitConverter byNSDev?

Mamma Balance ships an update every 6 months, and UnitConverter byNSDev every 5 months. Most recently, Mamma Balance was updated on August 15, 2026 and UnitConverter byNSDev on September 17, 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.*