letter maps vs PromptSmart
PromptSmart is the veteran of voice-following teleprompters. Its patented VoiceTrack engine listens as you speak, scrolls at your pace, pauses when you pause, and runs entirely on-device — so it works offline and keeps your audio local. It is a mature, polished native app, and that maturity is its main advantage over a young browser tool.
Compared June 2026. Vendor facts from official sources; “not stated” means the vendor doesn’t publicly document it.
| letter maps | PromptSmart | |
|---|---|---|
| Price | Free, forever | Subscription (~$8.99/mo or ~$79.99/yr); no permanent free tier |
| Account / sign-in | Not required | Account required for the modern PromptSmart+ |
| Runs in a browser (no install) | Yes | No — native iOS/Android/Windows/Mac apps (web is for editing/remote) |
| Voice-following | Yes | Yes — patented VoiceTrack |
| Offline voice-following | Yes — on-device (Chrome 139+) | Yes — recognition runs on-device, works offline |
| Audio stays on your device | Yes — optional on-device mode | Yes — audio processed on-device |
| Voice-following languages | Browser locale + language picker | 15 languages in PromptSmart+ (extra packs ~$29.99 each); legacy app English-only |
| Where your script lives | Your browser only (local-first) | Local, with optional cloud sync (iCloud / Drive / Dropbox) |
| Built-in video recording | No — prompter only | Yes — in-app recording |
| Platforms | Any browser (voice best in Chrome) | iOS, Android, Windows, macOS, Vision |
What PromptSmart does well
Choose PromptSmart if you want a battle-tested voice engine across native iOS/Android/desktop apps, broad multilingual packs, in-app recording, and team/enterprise features — and you don't mind paying a subscription and signing in.
Where letter maps differs
letter maps covers the same core idea — on-device, offline-capable voice-following — but with zero cost, no account, and nothing to install: you just open a URL. The trade-off is honest: PromptSmart has a decade-mature engine, native-app polish, broad language packs, and built-in recording; letter maps is free, private by default, and instant, but it's a prompter only and its voice-follow is best in Chrome.
Frequently asked questions
- Is PromptSmart free?
- No. As of June 2026 the modern PromptSmart+ is a subscription (around $8.99/month or $79.99/year) with a 7-day trial; some languages are paid add-on packs. letter maps is free with no account.
- Does PromptSmart work offline?
- Yes — VoiceTrack runs on-device and works without internet. letter maps offers the same with its on-device mode in Chrome 139+.
- Do I need to install PromptSmart?
- Yes — it's a native app on iOS, Android, Windows and macOS. letter maps runs in any browser with nothing to install.
Sources
Other comparisons: Speakflow, BIGVU, Teleprompter.com, CuePrompter