# Primum vs Doktu

The clearest difference is update cadence: Doktu at every 2 days against Primum's every 2 months. 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.

Primum ships an update every 2 months, Doktu every 2 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Primum | Doktu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/primum/id6651755259/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 75 MB | 66 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Primum](https://appshunter.io/developer/1707581637) | [Doktu LLC](https://appshunter.io/developer/6778468115) |

## What reviewers say

### Primum

[App page](https://appshunter.io/ios/app/primum/id6651755259)

Connect with expert oncologists for case-specific advice and treatment decision support. This app facilitates direct messaging with specialists, offering actionable insights and a platform to manage your inquiries efficiently.

**Highlights:** Search and filter expert oncologists, Direct messaging with specialists, Real-time chat and notifications, Case-specific advice, Inbox management, Reference past inquiries

**Features:** macOS Compatibility, iMessage stickers

**In-app purchases:** none


### Doktu

[App page](https://appshunter.io/ios/app/doktu/id6778468113)

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

**In-app purchases:** none


## Frequently asked questions

### Is Primum free?

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

### Is Doktu free?

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

### Do Primum or Doktu have ads?

Neither Primum nor Doktu shows ads.

### Which is updated more often, Primum or Doktu?

Primum ships an update every 2 months, and Doktu every 2 days. Most recently, Primum was updated on October 19, 2026 and Doktu on October 24, 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.*