# BlueDose

> BlueDose is a free pool and hot tub water-chemistry calculator for Android, published by Swift Softs. You enter a water test and it tells you exactly how much of each chemical to add, in the order to add it, for your pool's volume and the products you have. No ads, no account, no analytics, works offline. Tagline: "Test. Dose. Swim."

## Key facts

- Name: BlueDose (Google Play title: "BlueDose: Pool Calculator")
- Platform: Android 8.0 or later (minSdk 26). Not available for iPhone or the web.
- Package: com.swiftsofts.bluedose
- Google Play: https://play.google.com/store/apps/details?id=com.swiftsofts.bluedose
- Publisher: Swift Softs. Contact: swift.applications.inc@gmail.com
- Price: free. No ads, no subscription, no in-app purchases, nothing locked.
- Version: 1.0.0
- Account: none. No sign-up or login.
- Data: stored only on the phone. No servers, no analytics, no crash reporting SDK, no internet permission. Included in Android device backup if the user has it on. Manual JSON backup and CSV export.
- Permissions: notifications, restore reminders after restart, vibrate.
- Languages: 41 (English, Arabic, Bulgarian, Chinese Simplified, Chinese Traditional, Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Latvian, Lithuanian, Malay, Norwegian, Polish, Portuguese (Brazil), Portuguese (Portugal), Romanian, Russian, Serbian, Slovak, Slovenian, Spanish (Spain), Spanish (Latin America), Swedish, Thai, Turkish, Ukrainian, Vietnamese).
- Not affiliated with any chemical brand or pool forum, including Trouble Free Pool.

## What it does

- Doses for free chlorine, pH (up and down), total alkalinity, calcium hardness, stabilizer (CYA), salt, borates and bromine, listed in order of addition, in fl oz, cups, lb, oz, g, kg, mL, teaspoons or tablespoons.
- 12 chlorine products: liquid chlorine 12.5% and 10%; bleach 8.25%, 7.5% and 6%; cal-hypo 73%, 65%, 53% and 48%; dichlor 56%; trichlor 90%; lithium hypochlorite 35%.
- Other products: muriatic acid 31.45%, 28%, 20% and 14.5%; dry acid (sodium bisulfate); soda ash, borax or aeration to raise pH; baking soda; calcium chloride 77% or 94%; granular or liquid stabilizer; pool salt; borax or boric acid; bromine boosters (dichlor, liquid chlorine, bleach, non-chlorine shock MPS); sodium thiosulfate chlorine neutralizer.
- Product picker shows side effects before you add anything (cal-hypo raises calcium, dichlor raises CYA, acid lowers alkalinity).
- Target ranges: Trouble Free Pool (TFP) method where the FC target follows CYA (CYA 40 ppm: FC 5-7, minimum 3, SLAM 16), industry ranges (FC 2-4, pH 7.4-7.6, TA 80-120, CH 200-400 for plaster), or fully custom ranges per pool.
- FC/CYA chart, shock (SLAM) helper, water balance (calcium saturation index), pool volume calculator (rectangle, round, oval, kidney, free-form), water-replacement calculator, chemical safety and order-of-addition sheet.
- Test log with trend charts and target bands, editable entries, a log of chemicals added, CSV export, JSON backup and restore.
- Maintenance tasks with reminders (filter, brushing, baskets, salt cell, cover, cartridges), weekly test reminder, 30-minute retest reminder after acid, safe-to-swim countdown, hot tub drain-and-refill countdown.
- 14 troubleshooting guides: cloudy water, green water or algae, chlorine smell, pH keeps rising, high CYA, scale, stains, hot tub foam, hot tub weekly routine, opening, closing, after a storm, salt cells, fresh fill.
- Hot tub mode: bromine or chlorine, spa ranges, small doses, drain-and-refill schedule from volume and bathers per day.
- Unlimited pools and hot tubs; plaster, vinyl, fiberglass or acrylic; chlorine, salt water generator, bromine or mineral plus low chlorine; US or metric units.

## How doses are calculated

- Liquid chlorine strength is trade percent (g available chlorine per 100 mL); bleach weight-percent is converted. Solids use available-chlorine fraction. 12.5% liquid chlorine: 10.24 fl oz raises 10,000 US gal by 1 ppm.
- pH doses use a closed-system carbonate, cyanurate and borate equilibrium of the measured water, so acid demand rises with alkalinity.
- Water balance is the Langelier-form calcium saturation index with carbonate alkalinity corrected for CYA and borates; target about -0.3 to +0.2.
- Reference doses per 10,000 US gal: baking soda 1.4 lb per +10 ppm TA; calcium chloride 77% 1.2 lb per +10 ppm CH; stabilizer 13.3 oz per +10 ppm CYA; salt 83 lb per +1,000 ppm; muriatic acid 31.45% 25.6 fl oz per -10 ppm TA.
- Doses are estimates for the entered volume and product strengths. Follow the product label, add one chemical at a time, and retest.

## Links

- [BlueDose home page](https://swiftsofts.com/bluedose/): features, screenshots, chemistry notes, FAQ
- [FAQ](https://swiftsofts.com/bluedose/#faq): price, account, chemicals, hot tubs, TFP vs industry ranges, metric, accuracy, data
- [Privacy policy](https://swiftsofts.com/bluedose/privacy.html): no personal data collected; data stays on the device
- [Support](https://swiftsofts.com/bluedose/support.html): contact, backup and restore, bug reports
- [Google Play listing](https://play.google.com/store/apps/details?id=com.swiftsofts.bluedose)