# Pool Chemical Logbook > Commercial pool logbook—offline/online logs, exact dosing, inspector-ready PDFs Canonical page: [https://chrome-stats.com/d/com.poolbyengineer.chemicallog](https://chrome-stats.com/d/com.poolbyengineer.chemicallog) ## Overview - **ID:** `com.poolbyengineer.chemicallog` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Pool By Engineer Inc. - **Category:** TOOLS - **Downloads:** 154 - **Version:** 5.8 - **Last updated:** 2026-08-27 - **First published:** 2025-09-14 - **Publisher country:** US - **Size:** 17 MB - **Data as of:** 2026-09-07 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.poolbyengineer.chemicallog) - **Website:** [http://Www.PoolByEngineer.net](http://www.poolbyengineer.net/) - **Privacy policy:** [https://poolbyengineer.com/privacy-policy-of-pool-chem-log/](https://poolbyengineer.com/privacy-policy-of-pool-chem-log/) ## Description Built for commercial pools.
Pool Chemical Logbook is the professional logbook & calculator for hotels, HOAs, apartments, health clubs, and facilities—and it works great for homes, too. Record daily chemistry, see LSI instantly, compute exact product-based doses, and export inspector-ready monthly PDF logbooks. The app runs offline on-site and syncs to the cloud when you’re back online.

Why operators choose it:

- Code-friendly monthly logbook: Clear, inspector-ready PDF reports many cities expect you to keep on file.

- Offline-first: Keep logging and editing with no internet; your data syncs automatically when service returns.

- Commercial focus: Multiple pools/spas per property, fast entry, initials/notes, and correction workflows.

- Exact dosing, fewer callbacks: Product-aware math shows side-effects (e.g., dichlor adds CYA, cal-hypo adds CH) so you don’t over-correct.

What you can do:

1- Log pools & spas fast
pH, Free/Combined Chlorine (FC/CC), Total Alkalinity (TA), Calcium Hardness (CH), Stabilizer/CYA, TDS, Temperature, Flow, and Filter PSI.

2- See LSI live
Color-coded Langelier Saturation Index with a pointer—spot corrosive/balanced/scale-forming water at a glance.

3- Calculate precise chemical doses

- Raise FC: Liquid chlorine 12.5%, Cal-Hypo 67%, Dichlor 56%, Trichlor 90%

- Lower/neutralize FC: Sodium thiosulfate, Sodium sulfite

- Raise TA: Sodium bicarbonate, Soda ash, Sodium sesquicarbonate

- Lower TA / pH: Muriatic acid 31.45%, Sodium bisulfate

- Raise CH: Calcium chloride 100% / 77%

- Raise CYA: Cyanuric acid
Each option shows realistic side-effects and scales to your volume (US or metric).

4- Export inspector-ready monthly PDFs
One tap to generate professional summaries for audits, city/health reviews, or management reports.

5- Targets & guided corrections
Set your desired ranges and get step-by-step help to bring water back into balance.

6- Units your team expects
Gallons/Liters, °F/°C, and smart dose units (fl oz/gal/oz/lb or mL / L / g / kg).

Offline + cloud = reliable operations:

- Works anywhere: Logging, editing, and reviewing continue without internet.

- Automatic sync: When the device is online, the app syncs changes to your account for backup and device upgrades.

- Inspector-ready always: Your monthly logbooks are available on the device, and as PDFs, you can email or archive them.

Designed for:

- Commercial operators: Hotels, HOAs, apartments, community centers, fitness clubs, schools, and service companies.

- Residential owners: Anyone who wants simple steps, accurate dosing, and neat records.

Free vs Pro:

- Free: Quick logging, LSI gauge, targets, multiple pools/spas.

- Pro (subscription): Advanced chemical calculator & corrections, pH–TA coupled guidance, and PDF export.

Notes & safety:

Calculations use typical concentrations and industry formulas; always follow product labels, add chemicals with circulation running, brush after additions, and retest. Local regulations vary—use the app to support, not replace, your professional judgment and your jurisdiction’s code. ## Rankings - #1,804,804 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.INTERNET` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.providers.gsf.permission.READ_GSERVICES` - `com.poolbyengineer.chemicallog.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Pool Shark H2O Pro](https://chrome-stats.com/d/com.poolsharkh2o.app.pro) — 2,011 users, 4.30 / 5 - [Pool Chemical Calculator](https://chrome-stats.com/d/com.wittyapps.poolchem) — 26 users - [Pool Water Testing Log](https://chrome-stats.com/d/com.cpwitts.sofieloaf.pooltestlogging) — 51 users - [Pool Tracker Plus](https://chrome-stats.com/d/com.pooltrackerplus.app) — 30 users - [PoolBuddy: Pool Log & Tracker](https://chrome-stats.com/d/earlyowlsoftware.poolbuddy) — 9 users - [ClearPool — Pool Calculator](https://chrome-stats.com/d/com.clearstackapps.clearpool) — 140 users - [Poolsure Mobile](https://chrome-stats.com/d/com.aquasol.poolsuremobile) — 535 users - [Pool Water Calculator Pro](https://chrome-stats.com/d/com.pool.waterchemistrypro) — 32 users - [Shock The Poolie: Pool Service](https://chrome-stats.com/d/com.kgkv.poolspa) — 2 users - [PoolDesk](https://chrome-stats.com/d/com.pooldesk.app) — 16 users - [Pool Dashboard ™](https://chrome-stats.com/d/com.dbavictel.poolpal) — 22 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.poolbyengineer.chemicallog)