pH Comparison
Android app by NISAKE GAME. Tools · NISAKE GAME
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- Free to download
- In-app purchases
- Not listed in captured metadata
- Version
- 1.0.1
- Listing last refreshed
- 2026-09-12
View the original store listing
Store description excerpt
[Please note first] This app cannot work out a pH for you; a phone has no sensor for it. It says nothing about what is good for your skin, your hair or your health, and it gives no advice on handling household chemicals. You enter a pH you already know, and it is set against values that are already fixed. ────────── ≒ pH Comparison - how acidic is that, really? "pH 5.6" tells you almost nothing on its own. It is the pH of ordinary rain: carbon dioxide from the air dissolves into it, so even clean rain never settles at neutral. Enter one pH and set it against 22 things, from stomach acid to drain cleaner. ■ One step is ten times The scale is evenly spaced; what it counts is not. Black coffee (5.0) and pure water (7.0) are only 2 apart, yet they differ 100-fold in hydrogen ions. Stomach acid (1.5) and drain cleaner (13.5) are 12 apart: 10 to the 12th power, a trillion times over. Every row carries its own figure against pure water. Stomach acid is about 320,000 times, black coffee exactly 100 times, soapy water exactly 1/1000. ■ Ordinary rain is already acidic Carbon dioxide from the air dissolves into rain, so even clean rain settles at about pH 5.6. Acid rain is therefore reckoned from 5.6 downwards, not from 7. Against pure water that is about 25 times the hydrogen ions. ■ Blood moves by only 0.1 Of the 19 entries that carry a range, 17 span 0.4 or more, and shampoo and soapy water span 2.0. Human blood runs from 7.35 to 7.45, a spread of 0.1. The next narrowest after blood is cola, at 0.2. The body holds itself inside that narrow band. You only see it once everything is lined up together. ■ Twenty-two things Stomach acid 1.5, a strongly acidic hot spring 2.1, lemon juice 2.3, cola 2.5, vinegar 2.9, wine 3.4, orange juice 3.7, tomato juice 4.2, beer 4.4, black coffee 5.0, shampoo 5.5, ordinary rain 5.6, milk 6.7, pure water at 25 °C 7.0, human blood 7.4, seawater 8.1, baking soda in water 8.4, an alkaline hot spring 9.5, soapy water 10.0, limewater 12.4, chlorine bleach 12.5 and drain cleaner 13.5. Tap any row to load its pH. ■ A range is not a margin of error The pH of food and drink shifts with variety, origin and preparation. The range under a name is how much it varies with conditions, not an error bar, and every comparison is worked out from a single typical value. Searching by range would let the widest entries swallow everything around them, and blood, with its 0.1, would almost never come up at all. ■ Good for ▪ Making sense of a pH figure from the news or a science lesson ▪ Explaining acids and alkalis to a child ▪ Any moment you see a number and wonder how sour that really is ■ Things worth knowing (included in the app) ▪ One step of pH is ten times the hydrogen ions; 5 and 7 are 2 apart and differ 100-fold ▪ Ordinary rain is pH 5.6, and acid rain is reckoned below that ▪ Human blood moves only from 7.35 to 7.45, a spread of 0.1 ▪ Japanese labelling rules define these words for detergents and soaps, but nothin
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