# BIG KAISER vs PolymApp

The clearest difference is update cadence: PolymApp at every 2 weeks against BIG KAISER's every 2 months. BIG KAISER's advantage is device support (4 vs 1) and iOS requirement (12.0 vs 17.6). 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, PolymApp every 2 weeks. The most recent releases landed on June 11, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | BIG KAISER | PolymApp |
| --- | --- | --- |
| 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 2 weeks** |
| Monetization | Free | Free |
| Size | 82 MB | 44 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [BIG KAISER Praezisionswerkzeuge AG](https://appshunter.io/developer/1147203202) | [Fabian Schatzmann](https://appshunter.io/developer/1802601541) |

## 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


### PolymApp

[App page](https://appshunter.io/ios/app/polymapp/id6743395389)

This app provides comprehensive tools for CNC professionals, including calculators for tolerances, threads, and cutting data. It features a material database, machine management, and geometric calculations, all designed by an experienced polymechanic.

**Highlights:** ISO tolerance and pre-tolerance calculator, Thread calculator for standard and custom threads, Material database with over 400 materials, Machine and tool management, Cutting data calculator, Geometric shape calculations, Surface finish specifications

**Features:** macOS Compatibility, 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 PolymApp free?

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

### Do BIG KAISER or PolymApp have ads?

Neither BIG KAISER nor PolymApp shows ads.

### Which is updated more often, BIG KAISER or PolymApp?

BIG KAISER ships an update every 2 months, and PolymApp every 2 weeks. Most recently, BIG KAISER was updated on June 11, 2026 and PolymApp on September 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*