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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Skye
A
Grammarly
A
Windsurf
A
GitHub Copilot
B
TaglineAn agentic iPhone home screen that replaces your static icon grid with AI widgets that proactively surface health, calendar, finance, and local context — without you having to open a single app.Grammar check + tone + AI drafting, everywhere you type.Codeium's agentic IDE. Cascade agent + strong free tier.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
CategoryAgentsWritingCodingCoding
PricingWaitlist / Beta (pricing not yet disclosed)Free + $12-$15/mo Premium + team plansFree + $15/mo ProFree (limited) + $10/mo Pro + $19/mo Business
Best foriPhone power users who are frustrated that Siri is still reactive and want their home screen to actually anticipate their day.Non-native English writers, business email, anyone who types a lot.Developers who want Cursor-like power for less money.Teams with GitHub already. Devs who don't want to change IDEs.
Strengths
  • Ambient, proactive intelligence delivered via native iOS widgets — no app-switching required
  • Cross-domain context: health, calendar, email, finances, and local recommendations in one layer
  • Works within iOS permission model (no jailbreak or sideloading), making App Store approval plausible
  • Strong pre-launch signal: 25k+ waitlist and backing from a16z, True Ventures, and SV Angel
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
Weaknesses
  • Still pre-launch / beta — zero proven track record and no public pricing yet
  • iPhone-only by design, which immediately locks out half the smartphone market
  • Battery drain and privacy concerns from constant ambient context scanning are real and unresolved
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Smaller community
  • Model selection more limited
  • Less agentic than Cursor/Claude Code
  • Model quality varies
Kai's verdictThe concept is genuinely compelling — turning the home screen into a living AI layer is a smarter bet than yet another chat interface — but this is vaporware until it ships publicly and we see whether Apple's sandbox lets it breathe. (Verdict pending Phi's full review.)A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.A-tier. Close second to Cursor. If $5/mo matters, start here.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.
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