# Mass vs K

The clearest difference is price: Mass at Free against K's $2.99. Mass also leads on update cadence (every 3 weeks vs every 43 months) and iOS requirement (8.0 vs 15.0). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Mass is free to download; K costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mass ships an update every 3 weeks, K every 43 months. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Mass | K |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/mass-finder/id802275884/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 43 months |
| Monetization | **Free** | Paid |
| Size | 7 MB | 2 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Solaz Dazen srl](https://appshunter.io/developer/802275887) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### Mass

[App page](https://appshunter.io/ios/app/mass-finder/id802275884)

This utility app calculates the mass of metal and plastic preforms directly on the field. It supports various preform and material types, offering metric and imperial measurement modes for convenience.

**Highlights:** 13 preform types, 9 material types with alloys, Graphical preform representation, Metric and imperial modes, Help section, Easy to use

**Features:** macOS Compatibility

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-factor-for-bend-allowance/id1608326238)

This utility app calculates bend allowances and deductions for sheet metal fabrication. It helps engineers and fabricators determine precise K-Factor values, improving accuracy and reducing material waste in bending processes.

**Highlights:** K-Factor calculation, Bend allowance and deduction, Material and thickness support, Instant results, User-friendly interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Mass free?

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

### Is K free?

K costs $2.99, with no in-app purchases.

### Do Mass or K have ads?

Neither Mass nor K shows ads.

### Which is updated more often, Mass or K?

Mass ships an update every 3 weeks, and K every 43 months. Most recently, Mass was updated on October 23, 2026 and K on October 30, 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.*