Comparison

Pool Math by TroubleFreePool vs Pool Chemical LogBook

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

Head to head
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/

About

Pool Chemical LogBook

Features
Read full description

Keep pool and spa records organized, calculate chemical doses, and prepare PDF logbooks with Pool Chemical LogBook. FREE CALCULATOR Use Chemical Calculator and dosage/correction guidance in Guest mode without creating an account. Enter your volume and measurements, choose US or metric display units, and review water-balance calculations. CHLORINE AND SALT SYSTEMS Choose Chlorine or Salt for each pool or spa. For a salt system, record measured salt in ppm and configure the target and range for your equipment. Review unit-aware salt-addition guidance alongside the existing chemical recommendations. Salt values follow applicable readings into shared history, monthly PDFs and graphs; chlorine readings show salt as not applicable. Older readings without a salt measurement remain unrecorded. TDS and optional ORP readings are also available. ON-DEVICE LOGBOOK — NO REGISTRATION An App Store plan unlocks one on-device facility with up to three pools/spas, saved readings, PDF reports and graphs without an app account. Restore purchases on your supported Apple devices. Records remain on each device; Restore does not recover deleted files. Keep device backups and export important reports. Signing in does not automatically move local records or purchase ownership. PRIVATE CLOUD LOGBOOK Sign in for your account-specific facility logbook, saved reading history, reports and team permissions. Record pH, free and combined chlorine, alkalinity, hardness, cyanuric acid, temperature, flow, filter pressure, initials and notes. FACILITIES AND POOLS/SPAS Start with one protected main facility and one to three pool/spa body slots. Eligible owners can manage additional facilities from Account Info, with each facility's details and bodies grouped together. Archiving an extra facility retains its history and releases its facility credit; restoring it needs available capacity. The main facility remains protected from removal. OWNER-MANAGED TEAM ACCESS In multi-facility accounts, allocated active facilities and distinct active members share the owner's credits. The main facility includes the owner. Pool/spa bodies and facility assignments use no additional credits; inactive invitations use none. Four credits can cover two facilities and two active members, or three facilities and one active member. Owners assign Selected facilities or All current and future active facilities. Members add readings only within their active, assigned and funded access. Edit saved is a separate permission for changing or removing saved readings. Facility and billing management remain owner controls. ORIGINAL WORK AND HISTORY Eligible reading work can be saved offline with its original account, facility, pool/spa and values retained for synchronization. Facility admission, restoration and active allocation changes require a connection. Existing single-facility records and eligible original subscription benefits remain; additional-facility eligibility can require review. REPORTS AND TRENDS Choose the facility and pool/spa for monthly PDF logbooks and chemistry graphs. Select your month or date range and metrics, then export or share the report with its selected labels and scope. SUBSCRIPTIONS Auto-renewing App Store plans unlock the on-device Guest logbook without registration. Optional cloud/team services use account-specific permissions and purchase ownership. Review the selected product's displayed price and terms before purchase. Original packages retain their benefits and pricing; eligible store and manual-invoice coverage remain independent. Manage or cancel through the platform's subscription settings. Account deletion and store subscription cancellation are separate. Follow chemical product labels, allow circulation and retest after treatment. Privacy Policy: https://www.poolbyengineer.net/privacy-policy-of-pool-chem-log Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Pool Math by TroubleFreePool4 screens
Pool Chemical LogBook4 screens

Verdict

The call

The clearest difference is iOS requirement: Pool Math by TroubleFreePool at 15.0 against Pool Chemical LogBook's 18.6. On price, update cadence, ads and in-app purchases 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. Pool Math by TroubleFreePool sells 1 in-app purchase, starting at $7.99 per year and Pool Chemical LogBook sells 10 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Pool Math by TroubleFreePool ships an update fortnightly, Pool Chemical LogBook every 8 days. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 9 level
Pool Math by TroubleFreePool versus Pool Chemical LogBook: the parameters behind the verdict, then further details
ParameterPool Math by TroubleFreePoolPool Chemical LogBook
PriceFreeFree
Rating3.6 (287 ratings) — better—
Positive reviews63.3% of reviews—
Number of ratings287 — better—
Update frequencyFortnightlyEvery 8 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.6
Further details — not scored
Size314 MB27 MB
Age rating4+17+
DeveloperTroubleFreePoolPool By Engineer INC

Bugs and requests

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

Pool Chemical LogBook

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Pool Math by TroubleFreePool

Subscriptions1
  • Pool Math Premium Subscription$7.991 Year
10 purchases

Pool Chemical LogBook

Subscriptions10
  • Pro Monthly$11.991 Month
  • 2 Seat Monthly Plan$23.991 Month
  • 3 Seat Monthly Plan$35.991 Month
Show 7 more
  • 4 Seat Monthly Plan$47.991 Month
  • 5 Seat Monthly Plan$59.991 Month
  • 6 Seat Monthly Plan$69.991 Month
  • 7 Seat Monthly Plan$84.991 Month
  • 8 Seat Monthly Plan$94.991 Month
  • 9 Seat Monthly Plan$109.991 Month
  • 10 Seat Monthly Plan$119.991 Month

Questions

Is Pool Math by TroubleFreePool free?
Pool Math by TroubleFreePool is free to download, with in-app purchases available.
Is Pool Chemical LogBook free?
Pool Chemical LogBook is free to download, with in-app purchases available.
Do Pool Math by TroubleFreePool or Pool Chemical LogBook have ads?
Neither Pool Math by TroubleFreePool nor Pool Chemical LogBook shows ads.
Which is updated more often, Pool Math by TroubleFreePool or Pool Chemical LogBook?
Pool Math by TroubleFreePool ships an update fortnightly, and Pool Chemical LogBook every 8 days. Most recently, Pool Math by TroubleFreePool was updated on November 4, 2026 and Pool Chemical LogBook on October 30, 2026.

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