# BIG KAISER vs The Formula Calculator

The clearest difference is monetization model: BIG KAISER at free against The Formula Calculator's paid. BIG KAISER also leads on iOS requirement (12.0 vs 15.0). The Formula Calculator's advantage is update cadence (every 5 days vs every 2 months). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

BIG KAISER ships an update every 2 months, The Formula Calculator every 5 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | BIG KAISER | The Formula Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/big-kaiser/id1147203203/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 82 MB | 9 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BIG KAISER Praezisionswerkzeuge AG](https://appshunter.io/developer/1147203202) | [Sidney Thom](https://appshunter.io/developer/6813788039) |

## What reviewers say

### BIG KAISER

[App page](https://appshunter.io/ios/app/big-kaiser/id1147203203)

Access essential cutting data for various applications with this tool. It provides precise information for numerous boring heads, aiding in practical applications and specific tests. Save and share your cutting data easily.

**Highlights:** Cutting data for boring heads, Supports multiple languages, Cutting data in mm and inch, Infeed calculation with tolerances, Save and send cutting data, Connect with EWE tools

**In-app purchases:** none


### The Formula Calculator

[App page](https://appshunter.io/ios/app/the-formula-calculator/id6813788037)

This app serves as a comprehensive formula library and calculator, designed for tradespeople, engineers, and students. It offers over 200 formulas across various scientific disciplines, with automatic unit conversion and offline functionality.

**Highlights:** Extensive formula library (200+), Automatic unit conversion, Offline functionality, Searchable formulas and elements, Light and dark mode, Multi-language support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BIG KAISER free?

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

### Is The Formula Calculator free?

The Formula Calculator is free to download, with no in-app purchases.

### Do BIG KAISER or The Formula Calculator have ads?

Neither BIG KAISER nor The Formula Calculator shows ads.

### Which is updated more often, BIG KAISER or The Formula Calculator?

BIG KAISER ships an update every 2 months, and The Formula Calculator every 5 days. Most recently, BIG KAISER was updated on November 2, 2026 and The Formula Calculator on October 31, 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.*