# Calculator + vs Steel Pipe

The clearest difference is in-app purchases: Steel Pipe at none against Calculator +'s 12. Steel Pipe also leads on ads (none vs shown) and review sentiment (100% vs 85%). Calculator +'s advantage is update cadence (every 5 days vs every 4 months) and ratings volume (10K vs 34). On price and rating there is nothing between them.

Both are free to download. Calculator + sells 12 in-app purchases, starting at $4.99 per month. Steel Pipe asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Calculator + against 4.7 for Steel Pipe. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 34, so its average is the more settled of the two. Written reviews are what separate them: 85% of Calculator +'s written reviews are positive against 100% of Steel Pipe's.

Calculator + ships an update every 5 days, Steel Pipe every 4 months. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculator + | Steel Pipe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (10K ratings)](https://appshunter.io/ios/app/calculator-plus/id351815470/reviews) | **[4.7 (34 ratings)](https://appshunter.io/ios/app/steel-pipe/id1517543497/reviews)** |
| Number of ratings | **10K** | 34 |
| Positive reviews | 84.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 1 MB |
| Requires iOS | 16.4 | **13** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [xNeat.com](https://appshunter.io/developer/327498295) | [River Right Ltd](https://appshunter.io/developer/1515869956) |

## What reviewers say

### Calculator +

[App page](https://appshunter.io/ios/app/calculator-plus/id351815470)

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

**Highlights:** Free basic and scientific calculator, Intuitive interface with equation and result display, Fraction and percent support, Advanced editing capabilities, Polynomial and linear equation solver, Graphing calculator, Unit conversion and geometric calculators

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific Calculator | $4.99 | per month |
| Calculator | $39.99 | per year |
| Linear Calculator | $2.99 | one-time |
| Factoring Calculator | $2.99 | one-time |
| Handwriting Calculator | $2.99 | one-time |
| Currency Converter | $2.99 | one-time |
| Themes Pack | $2.99 | one-time |
| Graphing Calculator | $3.99 | one-time |
| Fraction Calculator | $3.99 | one-time |
| Scientific Calculator | $4.99 | one-time |
| Calculator Plus | $4.99 | one-time |
| Calculator | $16.99 | one-time |

**What reviewers like**

- 👍 Great features and easy to use
- 👍 Efficient and quick
- 👍 Versatile, functional calculator
- 👍 Fantastic, easy to use app
- 👍 Awesome calculator app

**What reviewers complain about**

- 🐛 New updated layout is awful
- 🐛 App is now terrible
- 🔒 Paying customer screwed over by update
- 🔒 Now timed trial, no free w/ads version
- 🔒 Not honest

**Reported bugs**

- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes

**Requested features**

- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines


### Steel Pipe

[App page](https://appshunter.io/ios/app/steel-pipe/id1517543497)

Access essential data for common steel pipe sizes, including outside diameter, wall thickness in both inches and millimeters, and weight per meter in pounds and kilograms. This utility app also provides pipe schedule information.

**Highlights:** NPS steel pipe data, Outside diameter, Wall thickness (inches/mm), Weight (lbs/kg per meter), Pipe Schedule information

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator + free?

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

### Is Steel Pipe free?

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

### Which has better reviews, Calculator + or Steel Pipe?

Steel Pipe is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Steel Pipe averages 4.7 from 34 ratings.

### Do Calculator + or Steel Pipe have ads?

Calculator + shows ads; Steel Pipe does not.

### Which is updated more often, Calculator + or Steel Pipe?

Calculator + ships an update every 5 days, and Steel Pipe every 4 months. Most recently, Calculator + was updated on October 31, 2026 and Steel Pipe 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.*