# Sizing US/CA vs NTI net

The clearest difference is rating: NTI net at 4.5 against Sizing US/CA's 3.2. NTI net also leads on ads (none vs shown) and ratings volume (76 vs 13). Sizing US/CA's advantage is monetization model (ad-supported vs free with in-app purchases) and iOS requirement (10.0 vs 13.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NTI net holds the better App Store score, 4.5 against 3.2. That said, the two scores are not equally well evidenced: NTI net has 76 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 11% of Sizing US/CA's written reviews are positive against 20% of NTI net's.

Sizing US/CA ships an update every 6 weeks, NTI net monthly. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sizing US/CA | NTI net |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (13 ratings)](https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews) | **[4.5 (76 ratings)](https://appshunter.io/ios/app/nti-net/id1575731502/reviews)** |
| Number of ratings | 13 | **76** |
| Positive reviews | 11.1% of reviews | **20.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 27 MB | 111 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Gastite Products LLC](https://appshunter.io/developer/668653608) | [Ariston SpA](https://appshunter.io/developer/549126466) |

## What reviewers say

### Sizing US/CA

[App page](https://appshunter.io/ios/app/sizing-usca/id1420112805)

This utility app helps installers determine the correct size of flexible gas piping for their projects. It calculates the appropriate pipe size based on gas type, tubing length, supply pressure, and flow capacity. Users can also access installation guides and product information.

**Highlights:** Flexible gas pipe sizing, US and CA location selector, Automatic value adjustment, Certification card access, Installation guide viewer, Product search, Direct contact with developer

**Features:** macOS Compatibility

**In-app purchases:** none


### NTI net

[App page](https://appshunter.io/ios/app/nti-net/id1575731502)

Control your home's heating system remotely for enhanced comfort and energy savings. Receive system failure notifications and opt for 24/7 professional assistance with an optional Pro subscription.

**Highlights:** Remote boiler and heat pump control, Temperature adjustment, Energy saving optimization, System failure notifications, 24/7 technical assistance (Pro)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sizing US/CA free?

Sizing US/CA is free to download, with no in-app purchases.

### Is NTI net free?

NTI net is free to download, with no in-app purchases.

### Which has better reviews, Sizing US/CA or NTI net?

NTI net is rated higher. Sizing US/CA averages 3.2 out of 5 from 13 ratings, while NTI net averages 4.5 from 76 ratings.

### Do Sizing US/CA or NTI net have ads?

Sizing US/CA shows ads; NTI net does not.

### Which is updated more often, Sizing US/CA or NTI net?

Sizing US/CA ships an update every 6 weeks, and NTI net monthly. Most recently, Sizing US/CA was updated on September 30, 2026 and NTI net on October 12, 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.*