# Anki 25.09 Release Candidate

**URL:** <https://forums.ankiweb.net/t/anki-25-09-release-candidate/66259>\
**Category:** Beta Testing\
**Created:** [September 4, 2025, 7:02am UTC](https://forums.ankiweb.net/t/anki-25-09-release-candidate/66259 "2025-09-04T07:02:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [September 4, 2025, 7:02am UTC](https://forums.ankiweb.net/t/anki-25-09-release-candidate/66259/1 "2025-09-04T07:02:41Z")

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Hi all,

A new release candidate is ready. Please give it a try and let us know how you go.

> **[Release 25.09rc1 · ankitects/anki](https://github.com/ankitects/anki/releases/tag/25.09rc1)**
>
> What's Changed
> Installing
> 
> Install the latest launcher from below
> Run Anki, and use Tools\>Upgrade/Downgrade
> Ensure you have beta versions enabled in the launcher before choosing 'latest version'
> 
> N...

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**Author:** ![womeda2](https://avatars.discourse-cdn.com/v4/letter/w/c89c15/32.png) [@womeda2](https://forums.ankiweb.net/u/womeda2)\
**Post date:** [September 4, 2025, 11:54am UTC](https://forums.ankiweb.net/t/anki-25-09-release-candidate/66259/2 "2025-09-04T11:54:44Z")

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As in line with previous betas, the “Help me Decide” feature uses the incorrect mathematical formulae and thus displays meaningless information to the user.

For calculating the DR to optimize efficiency, the user needs to see ΔΣR/Δ∫t, however it currently displays ΣR(\_end)/Δ∫t, which is not mathematically meaningful. This issue has been discussed extensively in this thread: [Replace CMRR with workload-vs-DR graph (+more) - #96 by ZornHadNoChoice](https://forums.ankiweb.net/t/replace-cmrr-with-workload-vs-dr-graph-more/63234/96)

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**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [September 6, 2025, 12:17pm UTC](https://forums.ankiweb.net/t/anki-25-09-release-candidate/66259/3 "2025-09-06T12:17:32Z")

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25.09 has been released as stable. If you encounter any issues with it, please let us know on a new thread.

@womeda2 this is not my area of expertise, so I can’t offer much useful input here. If you’re confident you have a better approach, I’d suggest trying to come up with some irrefutable evidence to sway the minds of the FSRS devs.

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**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [September 6, 2025, 12:17pm UTC](https://forums.ankiweb.net/t/anki-25-09-release-candidate/66259/4 "2025-09-06T12:17:58Z")

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