# Twinia vs Blood Oxygen Level

The clearest difference is review sentiment: Twinia at 100% against Blood Oxygen Level's 0%. Twinia also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.0). Blood Oxygen Level's advantage is update cadence (every 5 weeks vs every 4 months) and device support (4 vs 1). On price and ads there is nothing between them.

Both are free to download. Blood Oxygen Level sells 1 in-app purchase, starting at $9.99 per month. Twinia asks for nothing beyond the download.

Twinia ships an update every 4 months, Blood Oxygen Level every 5 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Twinia | Blood Oxygen Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.9 (193 ratings)](https://appshunter.io/ios/app/blood-oxygen-level-analyzer/id1595757329/reviews)** |
| Number of ratings | — | **193** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | **Free** | Subscription |
| Size | 5 MB | 24 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Twinia Solutions S.L.](https://appshunter.io/developer/1030732989) | [Svetlana Rabosh](https://appshunter.io/developer/1614133369) |

## What reviewers say

### Twinia

[App page](https://appshunter.io/ios/app/twinia/id406992992)

Access up-to-date information about a maxilofacial surgery clinic, its services, and medical staff. Complete and sign necessary forms digitally to streamline your visit and reduce waiting times.

**Highlights:** Clinic information and services, Medical staff profiles, Digital personal data forms, Online healthcare questionnaire, Digital disclaimers, Email PDF copies of forms

**Features:** macOS Compatibility

**In-app purchases:** none


### Blood Oxygen Level

[App page](https://appshunter.io/ios/app/blood-oxygen-level-analyzer/id1595757329)

Track your blood oxygen saturation levels and monitor changes over time. Log additional symptoms to gain a more comprehensive understanding of your condition. Supports multiple user profiles and synchronizes with HealthKit for pulse and oxygen data.

**Highlights:** Oxygen saturation tracking, Symptom logging, History of changes, Multiple user profiles, HealthKit synchronization

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blood Oxygen Monitor One Month | $9.99 | per month |


## Frequently asked questions

### Is Twinia free?

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

### Is Blood Oxygen Level free?

Blood Oxygen Level is free to download, with in-app purchases available.

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

Neither Twinia nor Blood Oxygen Level shows ads.

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

Twinia ships an update every 4 months, and Blood Oxygen Level every 5 weeks. Most recently, Twinia 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.*