# CTE Calculator vs API MeasurePro

The clearest difference is update cadence: API MeasurePro at every 3 months against CTE Calculator's every 15 months. On price, ads, in-app purchases and device support there is nothing between them.

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

CTE Calculator ships an update every 15 months, API MeasurePro every 3 months. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | CTE Calculator | API MeasurePro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cte-calculator/id1535102492/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 24 MB | 20 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Verisurf](https://appshunter.io/developer/468050982) | [Automated Precision Inc.](https://appshunter.io/developer/1846172575) |

## What reviewers say

### CTE Calculator

[App page](https://appshunter.io/ios/app/cte-calculator/id1535102492)

This utility app helps determine the change in length of common manufacturing materials caused by temperature fluctuations. It provides quick calculations for various materials, making it a handy tool for engineers and manufacturers on the go.

**Highlights:** Temperature effect calculations, Change in length determination, Common manufacturing materials, Portable utility, iOS compatible

**Features:** macOS Compatibility

**In-app purchases:** none


### API MeasurePro

[App page](https://appshunter.io/ios/app/api-measurepro/id6754576227)

**In-app purchases:** none


## Frequently asked questions

### Is CTE Calculator free?

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

### Is API MeasurePro free?

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

### Do CTE Calculator or API MeasurePro have ads?

Neither CTE Calculator nor API MeasurePro shows ads.

### Which is updated more often, CTE Calculator or API MeasurePro?

CTE Calculator ships an update every 15 months, and API MeasurePro every 3 months. Most recently, CTE Calculator was updated on October 6, 2026 and API MeasurePro on September 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.*