Blood Oxygen Level vs SugarSentry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blood Oxygen Level
Easily record your daily pulse and blood oxygen levels. Track your health statistics over time with simple data entry and clear visualizations. Requires an external device like a pulse oximeter or smartwatch for measurements.
- Record pulse measurements
- Record blood oxygen levels
- Daily measurement tracking
- View statistics over time
- Simple data entry
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Have a new pulse oximeter, but don't have a place to record your measurements? This app allows you to record your pulse and blood oxygen level daily. It's very simple, just record the measurements and check the statistics over time. IMPORTANT: This app does NOT measure blood oxygen or pulse using your iPhone or iPad, and it does NOT connect to any external medical device. It is a manual logbook for recording readings you enter yourself. This app is not a medical device and is not intended for diagnosis or treatment. Always consult a healthcare professional for medical advice.
SugarSentry
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Note: SugarSentry is for information only. It is not a medical device and must not be used to make medical decisions. Keep the alarms on your pump and sensor switched on, confirm readings on your pump, sensor or a blood glucose meter, and check with your doctor before changing anything about your treatment. SugarSentry shows glucose data from your own account with a compatible CGM provider, without changing any setting in that account or in the provider's apps. You need an existing care-partner account with a compatible CGM provider to use it. SugarSentry only reads your data. It cannot connect to your pump or sensor, and it cannot change your therapy. WHAT YOU SEE - Current glucose, trend, and how long ago the reading arrived - Active insulin, time in range, and a history chart with meal, insulin and calibration markers - Reservoir, pump battery, sensor battery and phone battery in one place - Direction at a glance: red for trending low, orange for high EVERY SURFACE - Lock Screen and Dynamic Island, updated as new readings arrive - Apple Watch app and complication - CarPlay Dashboard for while you drive - Siri: "what's my glucose?" YOUR PUMP'S ALERTS, PASSED ON SugarSentry passes on the alerts your pump reports to your CGM provider, such as low, high, sensor and reservoir alerts, and warns you when new readings stop arriving. Your pump's own settings decide which alerts exist. You choose the alert sound, snooze an alert, or silence one person's alerts when you can't respond. Test Alarm in Settings rings the full alarm screen on demand, so you can check how it sounds before you need it. A WEB LINK YOU SHARE YOURSELF Each person can have a randomly generated web link that cannot be guessed. SugarSentry never sends it anywhere: you copy it and send it yourself, to whoever you choose - a grandparent, a school nurse, a doctor. They see a read-only live view in any browser, with no app and no login. Create a new link and the old one stops working at once. MORE THAN ONE PERSON Follow more than one account from the same app, each with its own name, colour and alert settings. HONEST ABOUT GAPS When readings stop arriving, SugarSentry shows "--" rather than a number that might be mistaken for a current reading. PRIVACY No advertising, no analytics, no tracking. Your CGM provider sign-in is encrypted, and your readings are deleted from our server when you log out. We never sell or share your data. SugarSentry is an independent app and is not affiliated with, endorsed by, or sponsored by any CGM, insulin pump or sensor manufacturer.
Screenshots
Verdict
The clearest difference is ads: SugarSentry at none against Blood Oxygen Level's shown. SugarSentry also leads on update cadence (every 4 days vs every 6 weeks). Blood Oxygen Level's advantage is iOS requirement (15 vs 26.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Blood Oxygen Level ships an update every 6 weeks, SugarSentry every 4 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | Blood Oxygen Level | SugarSentry |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (2K ratings) — better | — |
| Positive reviews | 22.5% of reviews | — |
| Number of ratings | 2K — better | — |
| Update frequency | Every 6 weeks | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 15 — better | 26.0 |
| Further details — not scored | ||
| Size | 38 MB | 6 MB |
| Age rating | 4+ | 17+ |
| Developer | Enrique Villahermosa Juara | Tarmo Sari |
Bugs and requests
Blood Oxygen Level
Reported bugs
3 issues- Doesn't record or track oxygen levels accurately
- Compatibility issues with newer devices
- Unexpected charges and sign-ups to other services
Requested features
3 requests- Add a notes section for each entry
- Improve instructions on using the app
- Provide an ad-free subscription option
SugarSentry
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Blood Oxygen Level
No in-app purchases
SugarSentry
No in-app purchases
Questions
Is Blood Oxygen Level free?
Is SugarSentry free?
Do Blood Oxygen Level or SugarSentry have ads?
Which is updated more often, Blood Oxygen Level or SugarSentry?
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