# Uncertainty Calculator vs Actief College

The clearest difference is price: Actief College at Free against Uncertainty Calculator's $3.99. Actief College also leads on iOS requirement (15.1 vs 17.0). On rating, ratings volume, update cadence and ads there is nothing between them.

Actief College is free to download; Uncertainty Calculator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Uncertainty Calculator against 5.0 for Actief College. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Uncertainty Calculator ships an update every 3 months, Actief College every 2 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Uncertainty Calculator | Actief College |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/actief-college/id1463438521/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 44 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [Hoy B.V.](https://appshunter.io/developer/1320617172) |

## What reviewers say

### Uncertainty Calculator

[App page](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440)

This app allows users to perform error propagation calculations for mathematical expressions involving uncertain variables. It supports absolute and relative error inputs, various functions, and trigonometric calculations in degrees or radians. The tool helps ensure accurate reporting of results based on estimated errors.

**Highlights:** Error propagation calculations, Absolute and relative error input, Support for mathematical functions, Trigonometric calculations (degrees/radians), Variable combination in expressions, Significant figure guidance

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

**In-app purchases:** none


### Actief College

[App page](https://appshunter.io/ios/app/actief-college/id1463438521)

Stay connected with your school community. Access news, submit forms, communicate with staff, and view your personalized calendar. Get school updates even without logging in.

**Highlights:** Complete news feed, Handy forms submission, Direct messaging and notifications, Personalized event calendar, Set reminders for activities

**In-app purchases:** none


## Frequently asked questions

### Is Uncertainty Calculator free?

Uncertainty Calculator costs $3.99, with no in-app purchases.

### Is Actief College free?

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

### Which has better reviews, Uncertainty Calculator or Actief College?

Uncertainty Calculator and Actief College are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Uncertainty Calculator or Actief College have ads?

Neither Uncertainty Calculator nor Actief College shows ads.

### Which is updated more often, Uncertainty Calculator or Actief College?

Uncertainty Calculator ships an update every 3 months, and Actief College every 2 months. Most recently, Uncertainty Calculator was updated on October 18, 2026 and Actief College on October 24, 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.*