# Drop Counter vs Pipe Slope Calculator

The clearest difference is price: Drop Counter at Free against Pipe Slope Calculator's $2.99. Drop Counter also leads on update cadence (monthly vs every 2 months) and iOS requirement (15.1 vs 17.0). Pipe Slope Calculator's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

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

Drop Counter ships an update monthly, Pipe Slope Calculator every 2 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Drop Counter | Pipe Slope Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 49 MB | 8 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hannes Huwe](https://appshunter.io/developer/1740987589) | [Hugo Lamarre](https://appshunter.io/developer/1659517008) |

## What reviewers say

### Drop Counter

[App page](https://appshunter.io/ios/app/drop-counter-water-tracker/id6748688648)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Ad-Free | $0.99 | 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 Drop Counter free?

Drop Counter 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 Drop Counter or Pipe Slope Calculator have ads?

Neither Drop Counter nor Pipe Slope Calculator shows ads.

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

Drop Counter ships an update monthly, and Pipe Slope Calculator every 2 months. Most recently, Drop Counter was updated on October 30, 2026 and Pipe Slope Calculator on October 28, 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.*