# Submersible Audio Light Sensor — SALS

> SALS (iPhone/iPad app by American Printing House for the Blind (APH).)

- Source: https://appshunter.io/ios/app/submersible-audio-light-sensor/id1219412078 (this page in markdown: same URL + `.md`)
- Developer: [American Printing House for the Blind (APH)](https://appshunter.io/developer/704570515)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 14.0 · 5 MB
- Languages: American English, European Spanish
- Released: 2022-08-26
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/submersible-audio-light-sensor/id1219412078/reviews.md

## What is Submersible Audio Light Sensor?

The Submersible Audio Light Sensor (SALS) app works with the SALS probe, a Bluetooth Low Energy device, purchased separately from the American Printing House for the Blind. One end of the probe detects light in either air or liquids and the other end coverts detected light to sound (in the form of a tone) and sends the data to the app downloaded on an iPhone or iPad. Use of the app and probe alert a student with visual impairment or blindness that a chemical reaction has taken place (e.g., a precipitate has formed, pH has changed) in a beaker or test tube. Differences in luminance between the surfaces of objects in air (e.g., rocks or pH paper) can also be detected by the probe and app.


## Version history (last 3 releases)

### 1.5 — 2023-09-19

- adjusted the high frequency to make it lower

### 1.4 — 2022-10-12

- addresses issues when speak options are selected
- addresses bug that would sometimes not play saved tone

### 1.1 — 2022-08-26

No release notes.

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All apps by American Printing House for the Blind (APH): https://appshunter.io/developer/704570515

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*