# HVAC Pipe Sizer vs Angle Measure, Digital Ruler

The clearest difference is price: Angle Measure, Digital Ruler at Free against HVAC Pipe Sizer's $6.99. Angle Measure, Digital Ruler also leads on review sentiment (100% vs 67%) and update cadence (every 6 days vs every 9 months). On ads, in-app purchases and device support there is nothing between them.

Angle Measure, Digital Ruler is free to download; HVAC Pipe Sizer costs $6.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase and Angle Measure, Digital Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

HVAC Pipe Sizer ships an update every 9 months, Angle Measure, Digital Ruler every 6 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer | Angle Measure, Digital Ruler |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/angle-measure-digital-ruler/id6677031222/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 8 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Zain Saeed Mughal](https://appshunter.io/developer/1762408320) |

## What reviewers say

### HVAC Pipe Sizer

[App page](https://appshunter.io/ios/app/hvac-pipe-sizer-steam/id336112747)

Quickly size steam pipe systems by inputting piping and steam properties. Includes a steam table calculator and HVAC equipment locator. Supports English and metric units.

**Highlights:** Steam pipe sizing, Steam table calculator, HVAC Equipment Locator, English/metric unit selection, Pipe fitting database, Slider controls for input

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### Angle Measure, Digital Ruler

[App page](https://appshunter.io/ios/app/angle-measure-digital-ruler/id6677031222)

Transform your device into a versatile measuring tool. Accurately find and measure angles, levels, and distances with a digital protractor, ruler, and bubble level. Features include a flashlight and camera integration for precise work in any condition.

**Highlights:** Digital protractor and angle finder, Bubble level and 360° clinometer, Measuring tape and ruler functionality, Flashlight and camera integration, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is HVAC Pipe Sizer free?

HVAC Pipe Sizer costs $6.99, and also offers in-app purchases.

### Is Angle Measure, Digital Ruler free?

Angle Measure, Digital Ruler is free to download, with in-app purchases available.

### Do HVAC Pipe Sizer or Angle Measure, Digital Ruler have ads?

Neither HVAC Pipe Sizer nor Angle Measure, Digital Ruler shows ads.

### Which is updated more often, HVAC Pipe Sizer or Angle Measure, Digital Ruler?

HVAC Pipe Sizer ships an update every 9 months, and Angle Measure, Digital Ruler every 6 days. Most recently, HVAC Pipe Sizer was updated on November 1, 2026 and Angle Measure, Digital Ruler on October 31, 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.*