# Sensor Technology Engineering vs ToleranceLab

The clearest difference is price: Sensor Technology Engineering at Free against ToleranceLab's $2.99. Sensor Technology Engineering also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.6). On update cadence, ads and in-app purchases there is nothing between them.

Sensor Technology Engineering is free to download; ToleranceLab costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sensor Technology Engineering ships an update every 7 months, ToleranceLab every 8 months. The most recent releases landed on September 15, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Sensor Technology Engineering | ToleranceLab |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tolerancelab/id6757369411/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 8 months |
| Monetization | — | Paid |
| Size | 94 MB | 1 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sensor Technology Engineering](https://appshunter.io/developer/1668239053) | [Orlando Cossia Castiglioni](https://appshunter.io/developer/1866416694) |

## What reviewers say

### Sensor Technology Engineering

[App page](https://appshunter.io/ios/app/sensor-technology-engineering/id1627959712)

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

**In-app purchases:** none


### ToleranceLab

[App page](https://appshunter.io/ios/app/tolerancelab/id6757369411)

This app assists engineers in selecting and understanding ISO 286 fits for mechanical designs. It calculates clearance or interference based on nominal size and basis classes, providing visual representations of resulting diameters. The tool also estimates contact pressure and stress for press fits and includes a reference guide for definitions and recommendations.

**Highlights:** ISO 286 fit selection, Hole/shaft basis class calculation, Clearance/interference visualization, Guided fit intent picker, Press fit stress estimation, Metric/imperial unit switching

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sensor Technology Engineering free?

Sensor Technology Engineering is free to download, with no in-app purchases.

### Is ToleranceLab free?

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

### Do Sensor Technology Engineering or ToleranceLab have ads?

Neither Sensor Technology Engineering nor ToleranceLab shows ads.

### Which is updated more often, Sensor Technology Engineering or ToleranceLab?

Sensor Technology Engineering ships an update every 7 months, and ToleranceLab every 8 months. Most recently, Sensor Technology Engineering was updated on September 15, 2026 and ToleranceLab on September 8, 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.*