Case study

Oxygen Level Tracker - Pulse

An Android log for oxygen and pulse readings that users enter by hand, with charts and history

A simple log for people who check their blood oxygen and pulse with their own device: they type in each reading and the app shows the history as a chart and a list. We built the Android app from scratch for our client; it has more than 50,000 downloads on Google Play.

50K+ Google Play downloads

The public install band on the app’s Google Play listing, checked 31 Oct 2026.

View Oxygen Level Tracker - Pulse on Google Play

Screens recreated from the app's Google Play screenshots; example readings; the oximeter is drawn and stands for the user's own device.

Client: App publisher (client)
Platforms: Android
Our scope: Android app development

The product

What it does, and for whom

Readings from a fingertip pulse oximeter are easy to take and easy to forget. The app keeps them: a New Record screen with scroll wheels for SpO2 and pulse, a date and time, and a status band for the oxygen level; then a Tracker & Chart screen with both values plotted over time and every record listed and editable. An Info section explains SpO2 and pulse oximeters, and a breathing exercise is included. The app does not measure oxygen or heart rate, and it is not a diagnostic tool — it records what the user enters. On Google Play since March 2023 (version 1.9, March 2026).

Scope The client publishes the app on Google Play and owns its brand, listing and information content. Our team developed the Android app. Readings come from the user's own device; the app only stores and displays them. Google Play ratings rate the app, not Keshav Infotech.

Our contribution

What our team built

Android app development
The complete Android app, developed from scratch: manual SpO2 and pulse entry with date and time, status band, combined chart, editable history, information screens and the breathing exercise.

User flow

Enter a reading, see the trend

The three screens a user returns to.

Three Android screens of Oxygen Level Tracker in order: New Record with SpO2 98 and pulse 74 on scroll wheels, a Good status band, date, time and Save; Tracker & Chart with a week of oxygen and pulse lines and two dated records; and Blood Oxygen Info with five topics — Screens recreated from the app's Google Play screenshots, in the order of the steps below. Readings are example values. Numbered markers match the steps below.

Type in the reading
SpO2 and pulse from your own device, with date and time.
See chart and history
Both values over time, and every record listed.
Read the basics
Short explanations of SpO2 and oximeters.

The product in use

Inside the app

Fast manual entry
Scroll wheels set the SpO2 and pulse values, with the date and time beside them. A status band labels where the typed-in oxygen value sits in the app's ranges; the reading itself always comes from the user's own device.
Manual entry (example reading). Close-ups on phones: tap any image for the full screen.
Chart and history together
The Tracker & Chart screen plots oxygen and pulse on one chart by date, with each record below it — values, status, date and time — and an edit button, so a mistyped reading can be corrected.
A week of example readings. Close-ups on phones: tap any image for the full screen.
Information and a breathing exercise
An Info tab answers common questions — what SpO2 is, what an oximeter does, normal ranges and when to see a doctor — and a guided breath-holding exercise is included alongside.
Info topics and the breathing exercise.

Google Play store image: manual entry.
Google Play store image: chart and history.
Google Play store image: information.
Google Play store image: breathing exercise.

About these images: the phone screens are recreated from the app's Google Play screenshots, and every reading shown is an example value. They are not screenshots. The status label is the app's range label for the number the user typed in, not a medical assessment. The oximeter in the hero is drawn and stands for the user's own device. The gallery shows four store images as the client published them on Google Play. The app is a tracking tool, not a medical device: it does not measure oxygen or pulse, and it does not give a diagnosis.

Delivery

The engagement

Live on Google Play since March 2023; version 1.9, updated March 2026.
Over 50,000 downloads on Google Play (public install band, checked 31 Oct 2026).
Runs on Android 6.0 and later. Records readings typed in by the user; it does not measure them.

More delivered work