StreamSim
Master live before going live.
StreamSim is a practice-only live-stream simulator for new streamers. Rehearse going live in front of a realistic, reactive chat — all generated on your device. No viewers, no login, no platform watching.
100% on-device · No account · Nothing is ever broadcast
Reps before you go live
The stage fright killer for new streamers
Going live the first time is terrifying — empty chat, awkward silence, no idea what to say. StreamSim lets you get the reps in first. A believable chat scrolls, reacts, and hypes you up, so by the time you hit "Go Live" for real, it already feels normal.
Living chat engine
Chat drifts between quiet, normal, busy, and hype on its own, with randomized timing so it never feels scripted — a feed that breathes like the real thing.
Big Win · Big Fail
Trigger a clutch moment or a faceplant on demand and rehearse exactly how you react when a hundred messages hit at once.
Real-feel skins · Live camera
Run your real front camera behind a chat overlay that captures the structure and feel of the platforms you'll actually stream on — original colors and icons, no logos.
Familiar layouts
Practice in the format you'll stream in
StreamSim recreates the look and feel of the vertical live formats creators know — without using any logos, brand names, or trademarked assets.
Why StreamSim
Practice that stays private
No real audience can see you, because there isn't one. Every message, name, and viewer count is generated on your phone — so you can fumble, restart, and try again with zero stakes.
Practice-only
Built for rehearsal, not broadcasting. Get reps in until going live feels natural.
No audience, no login
No accounts, no platforms, no viewers. Nothing you do is ever sent anywhere.
100% on-device
The entire chat is generated locally — works offline, keeps your camera yours.
FAQ
Questions, answered
What StreamSim is — and what it isn't.
What is StreamSim?
StreamSim is a practice-only live-stream chat simulator. It generates a realistic, reactive chat feed — complete with platform skins that match Twitch, TikTok, YouTube, Instagram, Facebook, and Kick — so you can rehearse talking to "chat" on your device, privately, before you ever go live to a real audience. No viewers, no broadcast, no account.
Does StreamSim broadcast anything?
No. StreamSim is 100% on-device — nothing is ever sent anywhere. There's no audience, no platform connection, and no one watching. It's a private rehearsal space so you can practice freely without any pressure.
How realistic is the chat simulation?
Very. StreamSim's chat engine runs a live intensity state machine — chat drifts from quiet to normal to busy to full hype depending on what's happening in your session. Hit the Big Win button to trigger a hype burst, or Big Fail to watch chat react. Username styles, message templates, and chat pace all adapt to the intensity level, so it feels like a real stream, not a loop.
Who is StreamSim for?
Anyone who wants to get comfortable on camera before going live. StreamSim is especially useful for new streamers who freeze up reading chat, creators switching to a new platform and learning a new audience vibe, or anyone who wants reps without the public pressure of a real stream.
Is StreamSim available now?
Yes — StreamSim is available now on the App Store for iOS. Download it for free and start rehearsing your live-stream chat today.