Show HN: Simstim – local call transcription on Mac into .md files
Hey there HN! Simstim is a local-first and privacy-focused call transcription app for Mac. It records your mic and system audio (no bot joining calls) and transcribes everything on your machine. No account, no telemetry, audio never leaves your machine and all your data is in plain .md files (Obsidian native btw). Your AI subscription, free forever, MIT. I built it because I used to use Granola, and it was super annoying that I couldn't export my transcripts in some convenient manner. I needed a
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Source record
Recorded metrics
points · 1 votes
2026-11-10 13:00:31.075Z
cumulative since publication
Research analysis
Project record
Repository: pgrekovich/simstim. Source account: Hey there HN! Simstim is a local-first and privacy-focused call transcription app for Mac. It records your mic and system audio (no bot joining calls) and transcribes everything on your machine. No account, no telemetry, audio never leaves your machine and all your data is in plain .md files (Obsidian native btw). Your AI subscription, free forever, MIT. I built it because I used to use Granola, and it was super annoying that I couldn't export my transcripts in some convenient manner. I needed a
Observed adoption & comparisons
Source votes: 1 votes (Nov 10, 2026 UTC; cumulative since publication) Recent records to compare: “[分享创造] 被 Lightsail 收了 $500 超额费后，我做了个可能是史上最强的 Lightsail 省钱利器（免费开源，还能丢给 AI 算）” (V2EX, Oct 26, 2026); “[OpenWrt] 开源了一个网易 UU 远程开机路由器助手： OpenWrt / iStoreOS 实机验证与安全回滚” (V2EX, Oct 15, 2026). Shared themes are navigation hints; they have not been verified as the same need or independent corroboration.
Adoption decision
Evaluate it against the tool or manual workflow it would replace. The stored record supports discovery; it does not yet establish reliability, lower operating cost or commercial adoption.
Unverified requirements
Not verified: license permissions, required hardware, installation steps, maintenance status and a representative task with its failure cases.
Next test
Choose one real task and a current alternative. Record the commit, environment, input, output, elapsed time and failure behavior; retain the result before recommending adoption.