# Uncertainty Calculator vs SLMandic

The clearest difference is price: SLMandic at Free against Uncertainty Calculator's $3.99. SLMandic also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

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

Uncertainty Calculator ships an update every 3 months, SLMandic every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Uncertainty Calculator | SLMandic |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 69 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [São Leopoldo Mandic](https://appshunter.io/developer/1504503646) |

## 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


### SLMandic

[App page](https://appshunter.io/ios/app/slmandic/id1573777391)

This application streamlines student routines within an educational institution, offering tools to organize daily tasks. It aims to help students dedicate more time and focus to their studies.

**Highlights:** Streamline student routines, Organize daily tasks, Focus more on studies, Improve student experience, Educational institution tools

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Uncertainty Calculator free?

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

### Is SLMandic free?

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

### Do Uncertainty Calculator or SLMandic have ads?

Neither Uncertainty Calculator nor SLMandic shows ads.

### Which is updated more often, Uncertainty Calculator or SLMandic?

Uncertainty Calculator ships an update every 3 months, and SLMandic every 3 weeks. Most recently, Uncertainty Calculator was updated on November 2, 2026 and SLMandic on November 3, 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.*