# PulseOximeter vs Blood Oxygen Level

The clearest difference is rating: Blood Oxygen Level at 4.3 against PulseOximeter's 1.8. Blood Oxygen Level also leads on ratings volume (2K vs 23) and review sentiment (23% vs 0%). PulseOximeter's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Blood Oxygen Level holds the better App Store score, 4.3 against 1.8. That said, the two scores are not equally well evidenced: Blood Oxygen Level has 2K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 0% of PulseOximeter's written reviews are positive against 23% of Blood Oxygen Level's.

PulseOximeter ships an update every 2 months, Blood Oxygen Level every 6 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | PulseOximeter | Blood Oxygen Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (23 ratings)](https://appshunter.io/ios/app/pulseoximeter/id975203512/reviews) | **[4.3 (2K ratings)](https://appshunter.io/ios/app/blood-oxygen-level/id1582509614/reviews)** |
| Number of ratings | 23 | **2K** |
| Positive reviews | 0.0% of reviews | **22.5% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 3 MB | 38 MB |
| Requires iOS | **9.3** | 15 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Custom Software & Electronics](https://appshunter.io/developer/953947403) | [Enrique Villahermosa Juara](https://appshunter.io/developer/1581153213) |

## What reviewers say

### PulseOximeter

[App page](https://appshunter.io/ios/app/pulseoximeter/id975203512)

Monitor vital health metrics like blood oxygen saturation, pulse rate, and respiration rate. This application requires a certified CSE Medical pulse oximeter device for operation.

**Highlights:** Bluetooth connectivity, Blood oxygen saturation monitoring (%SpO2), Pulse rate tracking, Respiration rate measurement, Fischer Index, Perfusion Index

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Blood Oxygen Level

[App page](https://appshunter.io/ios/app/blood-oxygen-level/id1582509614)

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.

**Highlights:** Record pulse measurements, Record blood oxygen levels, Daily measurement tracking, View statistics over time, Simple data entry

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy interface
- 🚀 Impressive work
- 💡 Helpful for recording health conditions

**What reviewers complain about**

- 🐛 Doesn't record anything
- 🐛 Flickering and freezing issues
- 🔋 Ads make it unusable
- 🐛 Doesn't give accurate readings
- 🐛 Doesn't sync with devices

**Reported bugs**

- Doesn't record or track oxygen levels accurately
- Compatibility issues with newer devices
- Unexpected charges and sign-ups to other services

**Requested features**

- Add a notes section for each entry
- Improve instructions on using the app
- Provide an ad-free subscription option


## Frequently asked questions

### Is PulseOximeter free?

PulseOximeter is free to download, with no in-app purchases.

### Is Blood Oxygen Level free?

Blood Oxygen Level is free to download, with no in-app purchases.

### Which has better reviews, PulseOximeter or Blood Oxygen Level?

Blood Oxygen Level is rated higher. PulseOximeter averages 1.8 out of 5 from 23 ratings, while Blood Oxygen Level averages 4.3 from 2K ratings.

### Do PulseOximeter or Blood Oxygen Level have ads?

Blood Oxygen Level shows ads; PulseOximeter does not.

### Which is updated more often, PulseOximeter or Blood Oxygen Level?

PulseOximeter ships an update every 2 months, and Blood Oxygen Level every 6 weeks. Most recently, PulseOximeter was updated on November 1, 2026 and Blood Oxygen Level on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*