# Pipe Slope Calculator vs Pipe Slope Invert Planner

The clearest difference is update cadence: Pipe Slope Invert Planner at fortnightly against Pipe Slope Calculator's every 2 months. Pipe Slope Calculator's advantage is price ($2.99 vs $4.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Pipe Slope Calculator costs $2.99 and Pipe Slope Invert Planner $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pipe Slope Calculator ships an update every 2 months, Pipe Slope Invert Planner fortnightly. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Pipe Slope Calculator | Pipe Slope Invert Planner |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 8 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hugo Lamarre](https://appshunter.io/developer/1659517008) | [光 杨](https://appshunter.io/developer/1891134953) |

## What reviewers say

### Pipe Slope Calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Pipe Slope Invert Planner

[App page](https://appshunter.io/ios/app/pipe-slope-invert-planner/id6768115052)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pipe Slope Calculator free?

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

### Is Pipe Slope Invert Planner free?

Pipe Slope Invert Planner costs $4.99, with no in-app purchases.

### Do Pipe Slope Calculator or Pipe Slope Invert Planner have ads?

Neither Pipe Slope Calculator nor Pipe Slope Invert Planner shows ads.

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

Pipe Slope Calculator ships an update every 2 months, and Pipe Slope Invert Planner fortnightly. Most recently, Pipe Slope Calculator was updated on October 28, 2026 and Pipe Slope Invert Planner on November 5, 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.*