Writing · Keystone Studios

Notes from the studio.

Practical guides and deep dives on backend infrastructure for online games, creative tools, and the open-source things we ship.

01
Open source

reMarkable Sync Joins the Official Obsidian Community Marketplace

Our free reMarkable Paper Pro → Obsidian plugin is now listed in the official Obsidian community plugin marketplace — installable in two clicks, no manual files, with auto-updates.

02
Industry

PlayFab's Free Tier Just Dropped from 100K to 1,000 Users

PlayFab's Development Mode dropped from 100K to 1K free users. Here's what changed, what Foundation Mode means for non-Xbox developers, and why KeyStone is a strong alternative.

03
Product

Introducing Feature Voting — Frictionless User Feedback for Your Product

Feature Voting is live on Product Hunt. Collect user feedback and feature requests with authless voting, smart duplicate detection, and a clean admin dashboard — $4.99/mo.

04
Product

DarkRef Is Now Live on the iPad App Store

DarkRef, the cross-platform art reference board, is now available on the iPad App Store. Free to download with cloud sync across iOS, iPad, Windows, and MacOS.

05
Open source

reMarkable Sync for Obsidian – Sync Your Handwritten Notes as PDFs

A free, open-source Obsidian plugin that syncs your reMarkable Paper Pro documents to your vault as high-fidelity PDFs with full pen, color, and layer support.

06
Guide

Best PureRef Alternatives

Compare the best PureRef alternatives for artists—including DarkRef, the only cross-platform reference board with cloud sync for iOS, iPad, Windows, and MacOS.

07
Guide

Best PlayFab Alternatives

A practical comparison of platforms that replace or complement PlayFab—plus why KeyStone is a top choice for modern online games.