Compare AI tools

	Perplexity S	Skye A	Reflect A	NotebookLM S
Tagline	AI search done right. Cited answers, not chat theater.	An 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.	AI-powered networked notes. Roam with a brain.	Google's research notebook. Turns your docs into a podcast.
Category	Research	Agents	Productivity	Research
Pricing	Free + $20/mo Pro	Waitlist / Beta (pricing not yet disclosed)	$10/mo	Free
Best for	Replacing Google for any question where you want a cited answer in seconds.	iPhone power users who are frustrated that Siri is still reactive and want their home screen to actually anticipate their day.	Knowledge workers + thinkers who want AI in their second brain.	Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	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	AI auto-links related notes Generates backlinks + summaries Clean, minimal UX	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	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	Expensive for just notes Smaller community than Obsidian	Google-only Can be slow on large corpora
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	The 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. Niche but beloved. If you've outgrown Notion, try this.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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