# Smart Propane Scale vs Ruler

The clearest difference is rating: Ruler at 4.3 against Smart Propane Scale's 2.4. Ruler also leads on review sentiment (33% vs 13%) and ratings volume (133 vs 11). Smart Propane Scale's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Smart Propane Scale sells 1 one-off in-app purchase and Ruler sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Ruler holds the better App Store score, 4.3 against 2.4. That said, the two scores are not equally well evidenced: Ruler has 133 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 13% of Smart Propane Scale's written reviews are positive against 33% of Ruler's.

Smart Propane Scale ships an update every 5 months, Ruler every 7 months. The most recent releases landed on October 1, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Smart Propane Scale | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (11 ratings)](https://appshunter.io/ios/app/smart-propane-scale/id1429427836/reviews) | **[4.3 (133 ratings)](https://appshunter.io/ios/app/ruler-measuring-scale/id1449113794/reviews)** |
| Number of ratings | 11 | **133** |
| Positive reviews | 12.5% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 47 MB | 32 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [YSN Imports, Inc.](https://appshunter.io/developer/1429427835) | [MD KHAIRUL ISLAM](https://appshunter.io/developer/1445424899) |

## What reviewers say

### Smart Propane Scale

[App page](https://appshunter.io/ios/app/smart-propane-scale/id1429427836)

This utility app helps you monitor your propane levels to avoid running out unexpectedly. It provides real-time information on how much propane you have, eliminating guesswork and ensuring you're always prepared for activities like BBQs.

**Highlights:** Real-time propane level monitoring, Prevents running out of propane, Eliminates guesswork, Useful for BBQs and outdoor activities

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30lbs & 40lbs tank support | $1.99 | one-time |


### Ruler

[App page](https://appshunter.io/ios/app/ruler-measuring-scale/id1449113794)

This utility app uses augmented reality to measure the length and area of real-world objects using your smartphone's camera. It offers unlimited measurements and an ad-free experience with premium subscriptions.

**Highlights:** Augmented reality measurement, Measure length and area, High precision with AR Kit, Unlimited measurements (premium), Ad-free experience (premium), Subscription options available

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Premium Weekly | $1.99 | per 7 days |
| Ruler Monthly Premium | $5.99 | per month |


## Frequently asked questions

### Is Smart Propane Scale free?

Smart Propane Scale is free to download, with in-app purchases available.

### Is Ruler free?

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

### Which has better reviews, Smart Propane Scale or Ruler?

Ruler is rated higher. Smart Propane Scale averages 2.4 out of 5 from 11 ratings, while Ruler averages 4.3 from 133 ratings.

### Do Smart Propane Scale or Ruler have ads?

Ruler shows ads; Smart Propane Scale does not.

### Which is updated more often, Smart Propane Scale or Ruler?

Smart Propane Scale ships an update every 5 months, and Ruler every 7 months. Most recently, Smart Propane Scale was updated on October 1, 2026 and Ruler on October 17, 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.*