# Uncertainty Calculator vs Gurfa Tahfeez

The clearest difference is price: Gurfa Tahfeez at Free against Uncertainty Calculator's $3.99. Gurfa Tahfeez also leads on update cadence (weekly vs every 3 months) and ratings volume (7 vs 1). Uncertainty Calculator's advantage is rating (5.0 vs 2.0). On ads, in-app purchases and device support there is nothing between them.

Gurfa Tahfeez 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 holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Gurfa Tahfeez has 7 ratings behind it against 1, so its average is the more settled of the two.

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

## The numbers

| Metric | Uncertainty Calculator | Gurfa Tahfeez |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** | [2.0 (7 ratings)](https://appshunter.io/ios/app/gurfa-tahfeez/id1670101547/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 37.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 50 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) | [Mahad al Zahra](https://appshunter.io/developer/481674746) |

## 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


### Gurfa Tahfeez

[App page](https://appshunter.io/ios/app/gurfa-tahfeez/id1670101547)

This application facilitates online Quran classes and examinations for Mahad al-Zahra. It offers easy login for teachers and students, a sorted class roster, and a chat feature for communication. Enjoy high-quality video and audio for uninterrupted learning.

**Highlights:** Easy login for teachers and students, Class-time sorted student/teacher lists, In-app chat for communication, High-quality video and audio calls, Disturbance-free Quran learning

**Features:** macOS Compatibility, 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 Gurfa Tahfeez free?

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

### Which has better reviews, Uncertainty Calculator or Gurfa Tahfeez?

Uncertainty Calculator is rated higher. Uncertainty Calculator averages 5.0 out of 5 from 1 ratings, while Gurfa Tahfeez averages 2.0 from 7 ratings.

### Do Uncertainty Calculator or Gurfa Tahfeez have ads?

Neither Uncertainty Calculator nor Gurfa Tahfeez shows ads.

### Which is updated more often, Uncertainty Calculator or Gurfa Tahfeez?

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