# Ontol vs MedCastle

The clearest difference is update cadence: MedCastle at every 2 days against Ontol's every 9 days. MedCastle also leads on iOS requirement (13.0 vs 15.1). On price, ads, 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.

Ontol ships an update every 9 days, MedCastle every 2 days. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Ontol | MedCastle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ontol/id6448972926/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 53 MB | 22 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Tesser Inc.](https://appshunter.io/developer/1076266522) | [shimaa riyad](https://appshunter.io/developer/1895526286) |

## What reviewers say

### Ontol

[App page](https://appshunter.io/ios/app/ontol/id6448972926)

Decode complex medical reports with ease. Upload or snap a picture of your MRI, CT, or histopathology results to receive clear explanations of medical jargon and abbreviations. This tool aids understanding but should not replace professional medical advice.

**Highlights:** Medical jargon explanation, AI-powered analysis, Supports MRI, CT, histopathology, OCR and translation, Clearer understanding of reports

**Features:** macOS Compatibility

**In-app purchases:** none


### MedCastle

[App page](https://appshunter.io/ios/app/medcastle/id6763853257)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ontol free?

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

### Is MedCastle free?

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

### Do Ontol or MedCastle have ads?

Neither Ontol nor MedCastle shows ads.

### Which is updated more often, Ontol or MedCastle?

Ontol ships an update every 9 days, and MedCastle every 2 days. Most recently, Ontol was updated on October 10, 2026 and MedCastle on October 16, 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.*