Diffyn VS Mewmori

Diffyn's answer

Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.

Mewmori's answer:

The memory is about you, not about the conversation. It keeps facts, not transcripts, and returns to them days later without being asked.

And there is no cloud path to fall back on. The model runs on your Mac through llama.cpp, so there is no setting that sends a reply, a screenshot or a memory anywhere else.

Diffyn's answer

Diffyn is the platform that specializes on both change management and multi-model analysis.

Mewmori's answer:

It is a cat first. It has its own day: food, zoomies, hide-and-seek, a herb garden, expeditions. The talking sits inside that life instead of replacing it, so what you get on the desktop is company, not another panel.

Everything runs locally, the app is free, and the paid part is cosmetic. Skins and accessories, bought once, no subscription.

Diffyn's answer

React, Next.js, POSTGRESQL

Mewmori's answer:

Swift 6 and SwiftUI, a native macOS app, universal binary for Apple Silicon and Intel.

Conversations: llama.cpp with a Qwen 3.5 2B model in GGUF, running on Metal.

Screen context: ScreenCaptureKit and Vision, OCR on device.

Updates: Sparkle.

Diffyn's answer

Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.

Mewmori's answer:

People who keep a Mac open all day: developers, designers, writers, students. It reads the screen for context and remembers across sessions, so it pays off for someone who works in one place for hours, not someone who opens the laptop twice a week. Russian and English.

Diffyn's answer

I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.

Mewmori's answer:

The name reads two ways. Mew plus memory, a cat that remembers you. And memento mori. The second reading is deliberate: the cat has a life of its own going on whether you look at it or not.

It started as a desktop pet and turned into a memory problem. Making a cat move is easy. Making it bring up, a week later, the one thing you told it once is the part that took the work. Built by one developer; first public release 18 August 2026.