# TPCalc vs Pipe Slope Calculator

The clearest difference is price: TPCalc at Free against Pipe Slope Calculator's $2.99. TPCalc also leads on iOS requirement (13.0 vs 17.0). Pipe Slope Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support there is nothing between them.

TPCalc is free to download; Pipe Slope Calculator costs $2.99 up front. TPCalc sells 1 one-off in-app purchase. Pipe Slope Calculator asks for nothing beyond the download.

TPCalc ships an update every 4 months, Pipe Slope Calculator every 2 months. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TPCalc | Pipe Slope Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 21 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ahmet Erhan Ersan](https://appshunter.io/developer/1724558725) | [Hugo Lamarre](https://appshunter.io/developer/1659517008) |

## What reviewers say

### TPCalc

[App page](https://appshunter.io/ios/app/tpcalc/id6751998119)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.49 | one-time |


### Pipe Slope Calculator

[App page](https://appshunter.io/ios/app/pipe-slope-calculator/id6760373343)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TPCalc free?

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

### Is Pipe Slope Calculator free?

Pipe Slope Calculator costs $2.99, with no in-app purchases.

### Do TPCalc or Pipe Slope Calculator have ads?

TPCalc shows ads; Pipe Slope Calculator does not.

### Which is updated more often, TPCalc or Pipe Slope Calculator?

TPCalc ships an update every 4 months, and Pipe Slope Calculator every 2 months. Most recently, TPCalc was updated on October 7, 2026 and Pipe Slope Calculator on October 10, 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.*