Rewrite or reply to your messages before you send them, choosing from safer, funnier, or custom tones
AI study and research assistant for students and researchers
Stage
Startup
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free: $0 forever for on-device rewrites with unlimited rewrites, no account required. Pro: $3.99/month or $39.99/year; new subscribers get a 14-day free trial and can cancel anytime.
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Key features
Safer tone that clarifies and reduces hostility
Funnier tone that changes register
Custom tone by typing your own instructions
Cloud rewrites for Pro subscribers
How I Sound feature to apply your voice to rewrites
Support for longer drafts on Pro
Works in iPhone keyboard and as an app
Precise source linking with full context
Knowledge base builder with automatic connection mapping
Literature pattern recognition and automated data extraction
Research assistant with comprehensive literature search
Research gap detection
Citation generator for multiple citation styles
What makes it different
Never sends messages automatically—you always copy and send manually
Drafts never used to train models; privacy-first design
Free on-device rewrites with no daily limits or quotas
Works directly in iPhone keyboard for seamless workflow
Links every insight directly to its source to avoid AI hallucinations
Read 50 papers in 10 minutes instead of weeks
Deliver a literature review in 1 hour
Automatically maps connections and extracts key information from multiple documents
tono
SumiNote