Comparison

Bubble Level for iPhone vs Pool Math by TroubleFreePool

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Bubble Level for iPhone

This app offers a suite of measurement and detection tools, including a bubble level for alignment, angle measurement, surface flatness checks, and metal detection. It also features an AR ruler for distance measurement and an inclinometer for off-road navigation.

Highlights
  • Bubble level for object alignment
  • Angle measurement
  • Surface flatness check
  • Metal and wire detection
  • AR ruler for distance measurement
  • Inclinometer for tilt control
  • Compass
Read full description

NEW and UNIQUE features and functionalities: 1. Classic water-level + Object alignment 2. Angle measurement 3. Surface flatness 4. Metal detection - detect wire inside the wall before drilling it 5. Inclinometer - Also known as a tilt – meter; will help drivers during off-road journeys, to control and minimize the risk of roll-over. 6. AR Ruler - point your camera and measure distance between objects. 7. 3D Room Plan on Pro versions 8. 2D Room Plan 9. Compass With all the new features of this app, you'll always have carpenter and off-road navigator with you! From now, with the help of Bubble Level, you’ll never have the issues regarding: • Alignment of the picture, board, furniture, wall and etc.! • Calculation of different angles in various situations! • Checking your table, shelf and surface level of every face-up objects! • Detecting metal and even wire inside the wall • Tracking the inclination of bike, car and etc. These are the main occasions of app usage, but you’ll find MUCH MORE in practice! You can get Pro features through auto-renewing subscription and if you want to continue getting premium features, your subscription should be continued. 1 Monthly subscription costs $1.99 (or equivalent), free trial - 3 days and renews automatically every month , unless you cancel it through your iTunes account 3 Monthly subscription costs $7.99 (or equivalent), free trial - 3 days and renews automatically every month , unless you cancel it through your iTunes account 1 Year subscription costs $24.99 (or equivalent), free trial - 3 days and renews automatically every yearly , unless you cancel it through your iTunes account Monthly subscription no free trial costs $5.99 (or equivalent), renews automatically every month , unless you cancel it through your iTunes account Prices are in U.S. dollars, may vary in countries other than the U.S. and are subject to change with notice. Payment will be charged to your iTunes Account at confirmation of purchase. Your subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current subscription. Your account will be charged for a renewed subscription within 24 hours prior to the end of current subscription. You can manage your subscription and switch off the auto-renewal by accessing your account settings after purchase. You cannot cancel the current subscription during the active subscription period. Any unused part or time-span of a free trial period will be forfeited, as soon as you purchase a subscription. Subscription Terms: Payment will be charged to your Apple ID account at the confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Use (EULA): https://lmddata.blob.core.windows.net/lmdmore/bubleLevelMore/TermOfuse.html Privacy policy: http://lemondo.com/privacy We want to hear your suggestions, likes, complaints.. Please leave your feedback, rate us on the AppStore or use the contact link to stay in touch. Get Bubble Level NOW with simple, high resolution graphics and ENJOY!

About

Pool Math by TroubleFreePool

Easily manage your swimming pool's water chemistry by tracking key levels like chlorine and pH. This app calculates the precise amounts of chemicals needed to maintain clear, algae-free water, offering a cost-effective alternative to pool store advice.

Highlights
  • Chemical level calculators (pH, Chlorine, Alkalinity, etc.)
  • Track pool maintenance tasks
  • Log chemical additions
  • Weather condition tracking
  • Chemical addition effect calculations
  • Bleach price comparison
  • Data backup and export
Features
Read full description

PoolMath makes swimming pool care, maintenance and management easy by tracking chlorine, pH, alkalinity and other levels to help calculate how much salt, bleach and other chemicals to add. Keep swimming in your TroubleFreePool with Pool Math. Crystal clear algae free pool water is what Trouble Free Pool Math is committed to. Pool Math performs all the calculations you need to keep your chlorine, pH, calcium, alkalinity, and stabilizer levels balanced. Why choose Pool Math over the others? Other apps claim to make testing easy by using test strips and your phone's camera. Unfortunately, this is simply too good to be true. Test strips are notoriously inaccurate and end up costing you much more money in both chemicals and the tests themselves in the long run. Trouble Free Pool believes using a proper test kit is much easier, effective, and economical in the long run. By following these calculations the pool owner achieves and maintains crystal clear water without reliance on the often unproductive advice and unneeded expense from pool stores. Pool Math's great features include: • Calculators for pH, Free Chlorine, Calcium Hardness, Salt, Total Alkalinity, Calcium Hardness, Borates, CSI • Track Maintenance: Backwashing, Vacuuming, Filter Cleaning, Filter Pressure, SWG Cell %, Flow Rate • Track Chemical Additions • Track Weather conditions with your logs • Calculate the Effects of Adding chemicals to your pool • Bleach Price Calculator - Find the best deals on bleach easily • Summary page to see an overview of test results and chemical additions • Data backup / Export Premium Subscribers get access to these additional features: • Unlimited Test Log History Storage • Maintenance Reminders • Cloud Sync/Backup • Sync across multiple devices • Unlimited Pool / Spa Configurations • Test Log CSV Import / Export Pool Math Premium Subscription details: • Auto-renewable subscription • 1 year for $7.99 USD • Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration of 1 year) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. • Privacy Policy & Terms of Use: http://poolmathapp.com/privacy/

Screenshots

Bubble Level for iPhone4 screens
Pool Math by TroubleFreePool4 screens

Verdict

The call

The clearest difference is rating: Bubble Level for iPhone at 4.6 against Pool Math by TroubleFreePool's 3.7. Bubble Level for iPhone also leads on ratings volume (112K vs 272) and iOS requirement (13.0 vs 15.0). Pool Math by TroubleFreePool's advantage is ads (none vs shown) and review sentiment (63% vs 35%). On price, in-app purchases, monetization model and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bubble Level for iPhone sells 8 in-app purchases, starting at $4.99 per 7 days and Pool Math by TroubleFreePool sells 1 in-app purchase, starting at $7.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Bubble Level for iPhone holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Bubble Level for iPhone has 112K ratings behind it against 272, so its average is the more settled of the two. Written reviews complicate that: 35% of Bubble Level for iPhone's written reviews are positive against 63% of Pool Math by TroubleFreePool's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Bubble Level for iPhone ships an update every 5 weeks, Pool Math by TroubleFreePool fortnightly. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
Bubble Level for iPhone versus Pool Math by TroubleFreePool: the parameters behind the verdict, then further details
ParameterBubble Level for iPhonePool Math by TroubleFreePool
PriceFreeFree
Rating4.6 (112K ratings) — better3.7 (272 ratings)
Positive reviews35.4% of reviews63.4% of reviews — better
Number of ratings112K — better272
Update frequencyEvery 5 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size104 MB314 MB
Age rating4+4+
DeveloperLemondo Apps LLcTroubleFreePool

Customer experience

Bubble Level for iPhone

All ratings111,701 ratings
Positive91.8%
Neutral3.5%
Negative4.7%
Written reviews393 reviews
Positive35.4%
Neutral4.6%
Negative60.1%

Pool Math by TroubleFreePool

All ratings262 ratings
Positive66.0%
Neutral7.3%
Negative26.7%
Written reviews123 reviews
Positive63.4%
Neutral11.4%
Negative25.2%

User reviews

Bubble Level for iPhone

From 112K App Store ratings

What we love

  • 🚀 Handy tool
  • 👍 Useful features
  • 🚀 Accurate readings
  • 👍 Reliable for leveling RVs and caravans

Room to improve

  • 🐛 Inaccurate readings
  • 💩 Constant ads disrupting usage
  • 🤑 Paywall for full functionality
  • 🐛 Ads still present after paid upgrade

Pool Math by TroubleFreePool

From 272 App Store ratings

What we love

  • 💎 Excellent for maintaining a clean, balanced pool
  • 🔍 Comprehensive tracking of test results and chemical additions
  • 🧠 Helpful recommendations for chemical adjustments
  • ⚙️ Useful features like SLAM mode and timeline
  • 🤖 Automatic weather data logging

Room to improve

  • 🐛 Issues with data syncing and backup
  • 🤔 Unintuitive interface and navigation
  • 💰 Subscription model and lack of one-time purchase
  • 🚫 Limited support for non-chlorine sanitizers and spa-specific options
  • 🔄 Bugs with chemical addition logging and target value retention

Bugs and requests

Bubble Level for iPhone

Reported bugs

3 issues
  • App freezing/crashing
  • Ads blocking access to app features
  • Inconsistent performance across devices

Requested features

4 requests
  • Calibration option
  • Improved contrast for outdoor visibility
  • Larger font size for readouts
  • Plumb line view through camera

Pool Math by TroubleFreePool

Reported bugs

4 issues
  • Subscription issues and inability to restore purchases
  • App crashes and freezes on certain actions
  • Incorrect chemical recommendations and calculations
  • Disappearing historical data after updates

Requested features

5 requests
  • Custom target ranges and alerts
  • Ability to log non-standard chemical additions
  • Export options for data analysis
  • Apple Watch integration
  • Improved user guidance and on-boarding

In-app purchases

8 purchases

Bubble Level for iPhone

Subscriptions7
  • Weekly subscription$4.997 Days
  • Weekly free trial3 Days trial$4.997 Days
  • Monthly subscriptions$5.991 Month
Show 4 more
  • Bubble Level Pro3 Days trial$5.991 Month
  • 3 month3 Days trial$7.993 Months
  • 1 Year no free trial$19.991 Year
  • 1 Year3 Days trial$19.991 Year
One-time1
  • Remove Ads$0.99
1 purchases

Pool Math by TroubleFreePool

Subscriptions1
  • Pool Math Premium Subscription$7.991 Year

Questions

Is Bubble Level for iPhone free?
Bubble Level for iPhone is free to download, with in-app purchases available.
Is Pool Math by TroubleFreePool free?
Pool Math by TroubleFreePool is free to download, with in-app purchases available.
Which has better reviews, Bubble Level for iPhone or Pool Math by TroubleFreePool?
Bubble Level for iPhone is rated higher. Bubble Level for iPhone averages 4.6 out of 5 from 112K ratings, while Pool Math by TroubleFreePool averages 3.7 from 272 ratings.
Do Bubble Level for iPhone or Pool Math by TroubleFreePool have ads?
Bubble Level for iPhone shows ads; Pool Math by TroubleFreePool does not.
Which is updated more often, Bubble Level for iPhone or Pool Math by TroubleFreePool?
Bubble Level for iPhone ships an update every 5 weeks, and Pool Math by TroubleFreePool fortnightly. Most recently, Bubble Level for iPhone was updated on September 25, 2026 and Pool Math by TroubleFreePool on September 22, 2026.

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