# ONCOassist vs Embolus

The clearest difference is in-app purchases: ONCOassist at none against Embolus's 8. ONCOassist also leads on review sentiment (100% vs 71%) and update cadence (every 10 days vs every 2 months). Embolus's advantage is ads (none vs shown). On price, monetization model and device support there is nothing between them.

Both are free to download. Embolus sells 8 one-off in-app purchases. ONCOassist asks for nothing beyond the download.

ONCOassist holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: ONCOassist has 115 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 100% of ONCOassist's written reviews are positive against 71% of Embolus's.

ONCOassist ships an update every 10 days, Embolus every 2 months. The most recent releases landed on September 19, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | ONCOassist | Embolus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (115 ratings)](https://appshunter.io/ios/app/oncoassist/id558299114/reviews)** | [4.7 (16 ratings)](https://appshunter.io/ios/app/embolus/id1483032289/reviews) |
| Number of ratings | **115** | 16 |
| Positive reviews | **100.0% of reviews** | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 244 MB | 43 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Portable Medical Technology Ltd](https://appshunter.io/developer/558299117) | [Sang Medicine Ltd](https://appshunter.io/developer/1483032288) |

## What reviewers say

### ONCOassist

[App page](https://appshunter.io/ios/app/oncoassist/id558299114)

This app provides oncology professionals with a comprehensive suite of decision-support tools. It offers access to treatment protocols, survival rates, medical calculators, toxicity criteria, staging information, drug details, and news, all designed to aid in patient care and save time.

**Highlights:** NCCN Treatment Protocols, Adjuvant Survival Rate Calculators, Medical Formula Calculators, CTCAE Toxicity Criteria, AJCC TNM Staging, Prognostic Scores, Oncology Drug Information, Drug Interaction Checker

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Extremely helpful app
- 👍 Very practical and useful
- 👍 Great resource for building plans
- 👍 Up-to-date information
- 👍 Life saver for clinical research

**What reviewers complain about**

- 💡 Would be better if Radiation oncology topics were included
- 💡 Would be convenient if there was an option in Spanish
- 💡 Please add Russian language

**Requested features**

- Radiation oncology topics
- Option in Spanish
- Russian language


### Embolus

[App page](https://appshunter.io/ios/app/embolus/id1483032289)

This app provides clinical case studies and data interpretation exercises focused on laboratory haemostasis. It's designed to test and improve your knowledge for postgraduate Haematology exams and offers realistic patient and lab data.

**Highlights:** 70 clinical cases, 6 key haemostasis areas, Realistic patient data, Lab data interpretation, Exam question familiarization, Progress tracking

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Screening Tests | $1.99 | one-time |
| Factor Assays | $1.99 | one-time |
| Platelet Function Tests | $1.99 | one-time |
| Genetic Tests | $1.99 | one-time |
| Thrombophilia Tests | $1.99 | one-time |
| Miscellaneous Tests | $1.99 | one-time |
| Cloud Sync | $1.99 | one-time |
| Haemostasis | $9.99 | one-time |


## Frequently asked questions

### Is ONCOassist free?

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

### Is Embolus free?

Embolus is free to download, with in-app purchases available.

### Which has better reviews, ONCOassist or Embolus?

ONCOassist is rated higher. ONCOassist averages 4.9 out of 5 from 115 ratings, while Embolus averages 4.7 from 16 ratings.

### Do ONCOassist or Embolus have ads?

ONCOassist shows ads; Embolus does not.

### Which is updated more often, ONCOassist or Embolus?

ONCOassist ships an update every 10 days, and Embolus every 2 months. Most recently, ONCOassist was updated on September 19, 2026 and Embolus on September 7, 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.*