# Pipe Sizer vs Oil Change Reminder

The clearest difference is price: Oil Change Reminder at Free against Pipe Sizer's $0.99. Pipe Sizer's advantage is rating (5.0 vs 3.0) and in-app purchases (none vs 1). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Oil Change Reminder is free to download; Pipe Sizer costs $0.99 up front. Oil Change Reminder sells 1 one-off in-app purchase. Pipe Sizer asks for nothing beyond the download.

Pipe Sizer holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

## The numbers

| Metric | Pipe Sizer | Oil Change Reminder |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/pipe-sizer-water-pipe-sizing/id1576656624/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/oil-change-reminder/id6794923439/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | — |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#194** | — |
| Size | 1 MB | 2 MB |
| Requires iOS | **17.6** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Sindre Sørensen](https://appshunter.io/developer/1881331882) |

## What reviewers say

### Pipe Sizer

[App page](https://appshunter.io/ios/app/pipe-sizer-water-pipe-sizing/id1576656624)

**Currently charting:** #194 Top Paid · Utilities (US App Store)

This utility app assists in selecting appropriate pipe diameters for water systems, supporting both pressure and gravity flow calculations. It offers automatic recommendations based on user-defined limits and incorporates multiple pipe materials and unit systems.

**Highlights:** Pressure pipe sizing, Gravity pipe sizing, Automatic pipe size recommendations, Multiple pipe material support, SI and Imperial units, Hazen-Williams and Manning equations

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

**In-app purchases:** none


### Oil Change Reminder

[App page](https://appshunter.io/ios/app/oil-change-reminder/id6794923439)

This app helps you track your car's next oil change based on both time and mileage, whichever comes first. It learns your driving habits to provide accurate date-based reminders and logs your service history. The free version supports one vehicle, with an optional one-time purchase to manage multiple cars.

**Highlights:** Time and mileage-based reminders, Learns daily driving distance, Supports multiple vehicles (paid), Logs service history, iCloud sync for data backup, Works offline, No ads or tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $4.99 | one-time |


## Frequently asked questions

### Is Pipe Sizer free?

Pipe Sizer costs $0.99, with no in-app purchases.

### Is Oil Change Reminder free?

Oil Change Reminder is free to download, with in-app purchases available.

### Which has better reviews, Pipe Sizer or Oil Change Reminder?

Pipe Sizer is rated higher. Pipe Sizer averages 5.0 out of 5 from 3 ratings, while Oil Change Reminder averages 3.0 from 2 ratings.

### Do Pipe Sizer or Oil Change Reminder have ads?

Neither Pipe Sizer nor Oil Change Reminder shows ads.

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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.*