# Roon 2.70 — Roon 2.70 and ARC 1.80 are Live!

- Product: Roon (https://whatsnew.fyi/product/roon)
- Vendor: Roon Labs
- Date: 2026-07-07
- Version: 2.70
- Original notes: https://community.roonlabs.com/t/roon-2-70-and-arc-1-80-are-live/322250
- Permalink: https://whatsnew.fyi/product/roon/releases/2.70
- Labels: Platforms: Desktop

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Hey Everyone, Roon 2.70 is a significant performance-focused release. We are moving directly from 2.67 to 2.70 because it brings together several foundational changes across search, library browsing,…

- **changed** — Replaced in-house library search index with Tantivy, a fast Rust-based full-text search engine to improve search responsiveness and reduce memory usage in larger libraries
- **changed** — Replaced internal system for maintaining sorted library views to avoid unnecessary memory accumulation and processing work during library changes and metadata updates
- **changed** — Enabled sharing of equivalent browsing data between connected clients to reduce unnecessary duplication of work across the system
- **changed** — Updated Roon Remote for Android and iOS to .NET 10, replacing the older Mono runtime
- **changed** — Roon Remote for iPhone and iPad now requires iOS 12.2 or later
- **changed** — Improved Roon Radio to reduce repetitive selections within a radio session
- **fixed** — Fixed bug where holiday music was appearing out of season
- **fixed** — Fixed bug where some home screen recommendation content could get stuck and stop changing over time
- **fixed** — Restored visibility of play counts for non-library tracks in playlists
- **fixed** — Fixed visibility of Save and Cancel buttons in Edit Genre Mapping dialogue
- **fixed** — Fixed problem with synced lyrics in Roon ARC

Hey Everyone,
Roon 2.70 is a significant performance-focused release. We are moving directly from 2.67 to 2.70 because it brings together several foundational changes across search, library browsing, memory management, and Roon Remote on mobile devices
Improving Roon’s performance remains one of our highest engineering priorities. A large part of our current work is focused on making Roon feel consistently fast, responsive, and dependable, so that your attention stays on discovering and enjoying music rather than dealing with slowdowns or interruptions.
This release delivers the next major group of improvements in that effort. The changes are spread across different parts of Roon, but they all serve the same goal: reducing unnecessary work, lowering memory use, and making Roon more responsive as your library and usage grow.
We believe many customers will notice a meaningful improvement, especially those with larger libraries, frequent library changes, multiple connected devices, or long-running RoonServer installations.
At the same time, this is not the end of our performance work. We know that some customers may still encounter situations where Roon becomes slower than it should be. We are continuing to investigate those cases and are actively working on the next set of improvements.
Faster library search
We have replaced Roon’s in-house library search index with Tantivy, a fast Rust-based full-text search engine.
This change is designed to make existing library search behavior faster. It is not intended to change what Roon finds or how results are ranked.
Users with larger libraries should see the biggest benefit, particularly those with more than approximately 25,000 tracks. We expect this update to:
- Substantially reduce very slow searches in large libraries
- Improve search responsiveness across the app
- Reduce RoonServer’s settled memory usage, especially for larger libraries
More efficient browsing and library maintenance
We have also replaced the internal system Roon uses to maintain sorted library views, including browsing by artist, album, date added, and more.
Previously, this part of Roon could gradually accumulate unnecessary memory and processing work as your library changed. The effect could become more noticeable with frequent metadata updates, Smart Playlists, extended browsing, ARC sync activity, or multiple clients connected at once.
Roon could also create separate copies of equivalent browsing data for different connected clients. This meant that activity such as syncing ARC, playing music, adding tracks, or editing album information could sometimes create more work than necessary across the system.
The new approach avoids those issues. Equivalent browsing data can now be shared between clients where appropriate, while memory and processing needs remain proportional to the size of your library instead of increasing over time.
Together with several other fixes in this area, these changes make browsing and maintaining your library more efficient and help Roon remain responsive during normal day-to-day activity.
.NET 10 on Roon Remote for Android and iOS
Roon 2.70 marks the completion of a long-term modernization effort across Roon’s client applications.
In Roon 2.65, we moved our desktop applications to .NET 10. With this release, Roon Remote for Android and iOS has also made that transition, replacing the older Mono runtime. As a result, every Roon client now runs on the same modern .NET 10 foundation.
This gives us a more consistent platform across desktop and mobile, removes the need to keep building around older mobile technology, and creates more room for us to make larger improvements to Roon in future releases.
iOS compatibility
Roon Remote for iPhone and iPad now requires iOS 12.2 or later.
Roon Radio & Recommendation Improvements
We’ve been listening to feedback about Roon Radio’s repetitive selections for a long time, and we really appreciate everyone taking the time to let us know about your expe

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