# Uncertainty Calculator vs Delta

The clearest difference is price: Delta at Free against Uncertainty Calculator's $3.99. Delta also leads on update cadence (monthly vs every 3 months) and ratings volume (7 vs 1). Uncertainty Calculator's advantage is rating (5.0 vs 3.1) and in-app purchases (none vs 3). On ads there is nothing between them.

Delta is free to download; Uncertainty Calculator costs $3.99 up front. Delta sells 3 one-off in-app purchases. Uncertainty Calculator asks for nothing beyond the download.

Uncertainty Calculator holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Delta 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, Delta monthly. The most recent releases landed on September 14, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | Uncertainty Calculator | Delta |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** | [3.1 (7 ratings)](https://appshunter.io/ios/app/delta-algorithms/id1436506800/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | **Freemium** |
| Size | 1 MB | 5 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [Groupe MINASTE](https://appshunter.io/developer/1378426984) |

## 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


### Delta

[App page](https://appshunter.io/ios/app/delta-algorithms/id1436506800)

This app helps users solve math problems by creating and executing algorithms. It offers tools for homework checking, test preparation, and creating custom quizzes. Users can save, share, and download algorithms via the cloud.

**Highlights:** Create algorithms with natural language, Execute algorithms to solve math problems, Create and download custom quizzes, Save and share algorithms, Cloud synchronization for algorithms

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation 1 | $0.99 | one-time |
| Donation 2 | $2.99 | one-time |
| Donation 3 | $4.99 | one-time |


## Frequently asked questions

### Is Uncertainty Calculator free?

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

### Is Delta free?

Delta is free to download, with in-app purchases available.

### Which has better reviews, Uncertainty Calculator or Delta?

Uncertainty Calculator is rated higher. Uncertainty Calculator averages 5.0 out of 5 from 1 ratings, while Delta averages 3.1 from 7 ratings.

### Do Uncertainty Calculator or Delta have ads?

Neither Uncertainty Calculator nor Delta shows ads.

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

Uncertainty Calculator ships an update every 3 months, and Delta monthly. Most recently, Uncertainty Calculator was updated on September 14, 2026 and Delta on August 19, 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.*