Smart Propane Scale vs Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smart Propane Scale
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.
- Real-time propane level monitoring
- Prevents running out of propane
- Eliminates guesswork
- Useful for BBQs and outdoor activities
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Never run out of propane again! Flame King monitors your propane levels for you. From now on, you can know exactly how much propane you have in any given moment. No more guessing, no more getting stuck in the middle of your BBQ. Flame King got your back!
Ruler
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.
- Augmented reality measurement
- Measure length and area
- High precision with AR Kit
- Unlimited measurements (premium)
- Ad-free experience (premium)
- Subscription options available
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Ruler is the easiest and most accurate based on augmented reality. The app uses augmented reality technology(AR) to measure the real world object's area and length with your smartphone's camera. We have constantly improved this app since AR Kit was released which ensure the highest precision. Premium Services 1. Unlimited length Measurement. 2. Unlimited Area Measurement. 3. No Annoying ads. * Subscription is available like any ruler app. The payments will be charged to your iTunes account at confirmation of your purchase. * Subscription automatically renews for the same price and duration period as the original “one week”/”one month”/ unless auto-renew is turned off at least 24-hours before the end of the current period Our Standard Subscriptions are: 1. A one-week auto-renewal subscription with a 3-day trial period. 2. A one-month auto-renewal subscription with a 3-day trial period. Privacy Policy: https://sites.google.com/view/rulerios/terms-condition/privacy-policy Terms of Use: https://sites.google.com/view/rulerios/terms-condition
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Smart Propane Scale | Ruler |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (11 ratings) | 4.3 (133 ratings) — better |
| Positive reviews | 12.5% of reviews | 33.3% of reviews — better |
| Number of ratings | 11 | 133 — better |
| Update frequency | Every 5 months — better | Every 7 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 47 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | YSN Imports, Inc. | MD KHAIRUL ISLAM |
Customer experience
Smart Propane Scale
Ruler
In-app purchases
Smart Propane Scale
- 30lbs & 40lbs tank support$1.99
Ruler
- Ruler Premium Weekly3 Days trial$1.997 Days
- Ruler Monthly Premium3 Days trial$5.991 Month
Questions
Is Smart Propane Scale free?
Is Ruler free?
Which has better reviews, Smart Propane Scale or Ruler?
Do Smart Propane Scale or Ruler have ads?
Which is updated more often, Smart Propane Scale or Ruler?
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