Pool vs Pool Chemistry Assistant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pool
This app guides users through spa and hot tub water chemistry using a professional-grade test kit methodology. It ensures the correct order of chemical additions, provides precise dose recommendations, and calculates the LSI score for optimal water balance. The app is designed for poolside use with a focus on privacy and safety.
- Step-by-step chemical balancing
- Precise dose calculations
- LSI score calculation
- Chlorine and bromine modes
- Wet-hand friendly interface
- Local data storage
- Safety guardrails
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Stop guessing. Stop Googling. Pool-Proof walks you step-by-step through a complete spa or hot tub water chemistry session using Taylor K-2006 Platinum test kit methodology — the gold standard used by pool professionals. THE RIGHT ORDER, EVERY TIME Water chemistry is order-dependent. Balancing pH before alkalinity causes instability. Adding chlorine when pH is acidic corrodes equipment. Pool-Proof enforces the correct sequence: Free Chlorine, Total Alkalinity, pH, Calcium Hardness. Every time, without fail. PRECISE DOSE RECOMMENDATIONS Pool-Proof calculates exactly how much of each chemical to add — baking soda, muriatic acid, liquid chlorine, Cal-Hypo shock, dry acid, sodium carbonate (soda ash), calcium increaser, or granular bromine. Every dose follows the 50% Staged Dosing rule: add half the calculated amount, run jets for 45 minutes, then re-test. This prevents chemical bounce and over-treatment. Dose cards show liquid amounts in fl oz and mL, plus granular equivalents in household measures (tsp, tbsp, cup) — so you can use whatever product you have on the shelf. THE LSI SCORE The Langelier Saturation Index (LSI) is your water balance report card. Pool-Proof calculates it using CYA-corrected alkalinity per Taylor K-2006 methodology. A large color-coded score — from corrosive to scaling — gives you the full picture at a glance. CHLORINE & BROMINE Switch between chlorine and bromine mode from the Setup screen. Bromine mode adjusts all target ranges, skips CYA correction, and uses the correct dosing rates for granular bromine automatically. WET-HAND FRIENDLY Built for poolside use. Giant tap targets. Physical-style +/- drop counters that mirror the real test kit workflow. No tiny keyboard fields. Dark theme for outdoor readability. THE VAULT Save every test session. Review past LSI scores and readings. Spot trends over time. All history is stored privately on your device — no account required, no cloud sync. BUILT-IN SAFETY GUARDRAILS Pool-Proof includes the same safety rules professional techs follow: pH gate — chlorine dosing blocked when pH is below 7.0 Alkalinity guardrail — emergency baking soda forced when effective alkalinity drops dangerously low Acid cap — muriatic acid limited to a safe maximum per treatment cycle TA-first logic — pH corrections deferred until alkalinity is balanced FLEXIBLE FOR ANY SPA Gallons or liters volume input F or C temperature toggle Liquid or granular dose format preference Basic Mode (acrylic or fiberglass spa) or Pro Mode (plaster pool, full LSI and calcium hardness) Chlorine or bromine sanitizer COMPLETELY PRIVATE All data is stored locally on your device. No login. No subscription. No data collection. Nothing ever leaves your phone. Works with the Taylor K-2006 Platinum test kit. Trusted methodology. No guesswork. DISCLAIMER: Pool-Proof is a calculation aid designed to assist with routine residential spa maintenance. It does not replace professional water testing or licensed pool service technicians. Always follow chemical product labels and safety precautions.
Pool Chemistry Assistant
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This app was created so you don't have to go all over the internet and search for all sorts of different answers. It gives you a way to track your basic pool chemistry and also provides basic recommendations to correct pool chemistry so your water is nice and clear. NOTE: If your pool water is completely jacked up, seek professional help in clearing up and sanitizing your pool. This app is intended to help the average pool owner and not be a definitive solution for pool chemistry. The creators of the Pool Chemistry Assistant app make no guarantees or warranty any solutions or results when relying or using the app. Basic functions include: - Having multiple pools (if you're that rich or just want to help others with their pools) - Calculate pool capacity based on basic round or rectangular shape - Has a toggle for if you're using the PoolRX pod in your pump intake basket - Record pH, Chlorine, and Alkalinity readings. - Provide a Treatment Dosage report based on your readings and what to add based on your pool volume. - Log & Notes page shows a graph of 3 weeks of the 3 main readings logged. - You can edit the log entries after you've saved them. - You can save your recordings and logs to iCloud for a back-up but, all data is kept on your device. Any feedback is welcome and appreciated.
Screenshots
Verdict
The clearest difference is iOS requirement: Pool at 15.0 against Pool Chemistry Assistant's 26.5. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Pool | Pool Chemistry Assistant |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Every 6 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 12+ | 4+ |
| Developer | Brandon Currie | Jeremy Gibson |
In-app purchases
Pool
No in-app purchases
Pool Chemistry Assistant
No in-app purchases







