# Piping DataBase vs Auto101 Pro

The clearest difference is price: Auto101 Pro at Free against Piping DataBase's $3.99. Auto101 Pro also leads on rating (5.0 vs 2.0) and in-app purchases (none vs 1). Piping DataBase's advantage is chart position (#184 vs unranked) and iOS requirement (8.0 vs 16.0). On review sentiment, ads and device support there is nothing between them.

Auto101 Pro is free to download; Piping DataBase costs $3.99 up front. Piping DataBase sells 1 one-off in-app purchase. Auto101 Pro asks for nothing beyond the download.

Auto101 Pro holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Auto101 Pro has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Piping DataBase ships an update every 3 months, Auto101 Pro every 2 weeks. The most recent releases landed on September 4, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Piping DataBase | Auto101 Pro |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/piping-database-flanges/id363683966/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/auto101-pro/id6757863826/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#184** | — |
| Size | 6 MB | 133 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Radin Alcira](https://appshunter.io/developer/352538434) | [AUTO101 LLC](https://appshunter.io/developer/1869348805) |

## What reviewers say

### Piping DataBase

[App page](https://appshunter.io/ios/app/piping-database-flanges/id363683966)

**Currently charting:** #184 Top Paid · Utilities (US App Store)

This app provides a mobile reference for pipe flange specifications, including dimensions, bolt details, and types. It's designed for professionals and students in industries like oil & gas and petrochemicals, offering unit conversion between US Customary and SI.

**Highlights:** Pipe flange specifications, Large diameter flange support, Multiple flange types, Bolt count, diameter, and length, Raised Face (RF) and Ring Type Joints (RTJ), US Customary and SI unit conversion

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flanges B16.47 | $1.99 | one-time |


### Auto101 Pro

[App page](https://appshunter.io/ios/app/auto101-pro/id6757863826)

This professional diagnostic tool provides in-depth analysis and control for GM, Ford, and Chrysler vehicles. It allows reading and clearing diagnostic trouble codes, performing relearn procedures, and managing vehicle security systems.

**Highlights:** Read/Clear DTCs, Perform relearn procedures, Manage vehicle security, Read VIN and calibration data, Support for GM, Ford, Chrysler

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

**In-app purchases:** none


## Frequently asked questions

### Is Piping DataBase free?

Piping DataBase costs $3.99, and also offers in-app purchases.

### Is Auto101 Pro free?

Auto101 Pro is free to download, with no in-app purchases.

### Which has better reviews, Piping DataBase or Auto101 Pro?

Auto101 Pro is rated higher. Piping DataBase averages 2.0 out of 5 from 1 ratings, while Auto101 Pro averages 5.0 from 5 ratings.

### Do Piping DataBase or Auto101 Pro have ads?

Neither Piping DataBase nor Auto101 Pro shows ads.

### Which is updated more often, Piping DataBase or Auto101 Pro?

Piping DataBase ships an update every 3 months, and Auto101 Pro every 2 weeks. Most recently, Piping DataBase was updated on September 4, 2026 and Auto101 Pro on September 18, 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.*