# BIG KAISER vs Tolerance Helper

The clearest difference is update cadence: Tolerance Helper at weekly against BIG KAISER's every 2 months. BIG KAISER's advantage is iOS requirement (12.0 vs 15.0). 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, Tolerance Helper weekly. The most recent releases landed on June 11, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | BIG KAISER | Tolerance Helper |
| --- | --- | --- |
| 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 | **Weekly** |
| Monetization | Free | Free |
| Size | 82 MB | 21 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) | [Dmitriy Trofimov](https://appshunter.io/developer/1598378710) |

## 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


### Tolerance Helper

[App page](https://appshunter.io/ios/app/tolerance-helper/id6745212628)

This engineering reference tool simplifies calculating ISO standard tolerances for mechanical design and manufacturing. It provides instant calculations for hole and shaft dimensions, with support for multiple units and a user-friendly interface.

**Highlights:** ISO tolerance calculations for holes and shafts, Complete engineering tolerance reference table, Minimum, maximum, and average dimension calculations, Multi-unit support (mm, inches, micrometers), Powerful search and filtering of designations, User-friendly interface with color-coded indicators, Dark mode support

**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 Tolerance Helper free?

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

### Do BIG KAISER or Tolerance Helper have ads?

Neither BIG KAISER nor Tolerance Helper shows ads.

### Which is updated more often, BIG KAISER or Tolerance Helper?

BIG KAISER ships an update every 2 months, and Tolerance Helper weekly. Most recently, BIG KAISER was updated on June 11, 2026 and Tolerance Helper on September 26, 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.*