# Kwirk.io vs Dopamine Killer

The clearest difference is device support: Kwirk.io at 3 against Dopamine Killer's 1. Kwirk.io also leads on iOS requirement (13.0 vs 16.2). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Kwirk.io | Dopamine Killer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kwirkio/id6446597670/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | — |
| Size | 3 MB | 1 MB |
| Requires iOS | **13.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Rheosoph GmbH](https://appshunter.io/developer/1663636734) | [Street567](https://appshunter.io/developer/1513781813) |

## What reviewers say

### Kwirk.io

[App page](https://appshunter.io/ios/app/kwirkio/id6446597670)

This AI-powered writing tool enhances your writing speed and quality. It integrates advanced AI support and allows embedding various media types into your documents. Collaborate in real-time with end-to-end encryption and export your work in multiple formats.

**Highlights:** Next-gen AI writing technology, ChatGPT integration, Embed YouTube videos, images, Figma, Offline-first experience, End-to-end encrypted real-time collaboration, File export (markdown, text, docx)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dopamine Killer

[App page](https://appshunter.io/ios/app/dopamine-killer-nudback/id6761686630)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kwirk.io free?

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

### Is Dopamine Killer free?

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

### Do Kwirk.io or Dopamine Killer have ads?

Neither Kwirk.io nor Dopamine Killer shows ads.

### Which is updated more often, Kwirk.io or Dopamine Killer?

Kwirk.io ships an update every 4 months, and Dopamine Killer every 4 months. Most recently, Kwirk.io was updated on November 3, 2026 and Dopamine Killer on October 31, 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.*