I need an affordable way to test acidity that is reusable or cheap, avoiding the high cost of specialized acid test solutions.

Existing acid test solutions cost $16 while litmus paper is $0.03 per strip, but litmus paper is not reusable and the user is unsure if it works for their application.

Severity

2Mild

Willingness to Pay

none

Added

May 7, 2026

Workarounds Described

using litmus paper as a cheap substitute for acid test solution
considering blowing a small sample onto litmus paper to avoid using expensive solution

Implied Software Gaps

a digital acidity tester that eliminates the need for disposable consumables and provides accurate results

App Concept

ReAcid Test Pro

A reusable electronic acidity tester that gives instant, accurate readings for precious metals testing. Simply touch the probe to the material and get a digital readout, eliminating the need for consumable test solutions or paper strips.

Key Features

Reusable digital probe with no consumables
Instant digital readout of acidity level
Calibrated for precious metals testing (gold, silver, platinum)
Durable, pocket-sized design for field use

Target Users: Jewelers, pawnbrokers, scrap metal dealers, and hobbyists who test precious metals frequently and want to avoid recurring costs of test solutions.

Revenue Model: $89 one-time hardware purchase, with optional $19/year calibration subscription

Existing Solutions Mentioned

litmus paperacid test solution

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