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Best AI research and productivity tools with mobile apps

Updated 19 Oct 2026 · Prices from vendor pages only · How we rank →

The short answer

Each of these AI research and productivity tools lists an iOS, Android or mobile app among its platforms. NotebookLM comes first: answers grounded in your own sources, free for personal use, with Audio and Video Overviews. The cheapest verified paid plan here is Gemini Deep Research Google AI Plus ($4.99/month). 6 of the 7 have a free plan we could confirm. Every price below is from the vendor’s own page, checked 16–19 Oct 2026.

Ranked shortlist

  1. NotebookLM: Answers grounded in your own sources, free for personal use, with Audio and Video Overviews. Plan: In Google AI Pro: $19.99/month (Google AI Pro)
    4x limits, 300 sources
  2. Notion AI: AI built into the docs and databases teams already use, with custom agents on Business. Plan: Plus: $10/member/month
    AI trial
  3. Granola: AI notepad that enhances your meeting notes without a bot. Plan: Business: $14/user/month
  4. ChatGPT Deep Research: ChatGPT's agentic multi-step web research reports. Plan: Go: $8/month
    More messages, uploads and image creation; limited Codex; may include ads
  5. Gemini Deep Research: Gemini's multi-step research reports from the web. Plan: Google AI Plus: $4.99/month
    2x Free usage
  6. Motion: AI calendar and task scheduling. Plan: Pro AI: $19/seat/month
    7,500 credits/seat/month
  7. Mem: AI-organised note-taking. Plan: Mem Plus: $9/month

Order follows ToolRank’s editorial ranking in Research & Productivity, filtered to tools that fit this page. Anything we couldn’t confirm on a vendor page says “Not yet verified”.

Side by side

RankToolRelevant planStarting priceFree planBest forMain limitationLast checked
#1NotebookLMIn Google AI Pro: $19.99/month (Google AI Pro)
4x limits, 300 sources		Included in Google AI Plus (see Google AI plans)Standard chat/generation limits, up to 50 sources per notebookStudents and researchers working from their own documentsFree plan: standard limits and up to 50 sources per notebook; more needs a Google AI plan.16 Oct 2026
#2Notion AIPlus: $10/member/month
AI trial		$20/member/month (Business, includes Notion AI)Free plan includes a trial of Notion AI onlyTeams whose knowledge already lives in NotionFree and Plus only include an AI trial; full AI needs Business ($20/member/month).16 Oct 2026
#3GranolaBusiness: $14/user/month$14/user/month (Business)Basic: $0Bot-free AI meeting notesTeam features need Business16 Oct 2026
#4ChatGPT Deep ResearchGo: $8/month
More messages, uploads and image creation; limited Codex; may include ads		$8/month (ChatGPT Go)ChatGPT Free includes limited deep researchMulti-step web research reports from inside ChatGPTFree use is limited; more deep research needs a paid ChatGPT plan19 Oct 2026
#5Gemini Deep ResearchGoogle AI Plus: $4.99/month
2x Free usage		$4.99/month (Google AI Plus)Free: Deep Research is included in the $0 plan with a Google AccountResearch reports built from hundreds of web sources, inside the Gemini appMore Deep Research use needs Google AI Pro or Ultra19 Oct 2026
#6MotionPro AI: $19/seat/month
7,500 credits/seat/month		$19/seat/month (Pro AI)Free trialAuto-scheduling tasks into your calendarNo free plan; billing period for the listed price was not clear on the page16 Oct 2026
#7MemMem Plus: $9/month$9/month (Mem Plus)Free: 25 new notes/monthAI note-taking that organises itselfFree plan caps new notes16 Oct 2026

Prices as listed by each vendor on the last-checked date, USD, before tax. Plans and limits change, so follow the sources below.

Who should pick which

Pick NotebookLM for students and researchers working from their own documents (In Google AI Pro: $19.99/month (Google AI Pro)); think twice if you need open web search as the main source. Pick Notion AI for teams whose knowledge already lives in Notion (Plus: $10/member/month); think twice if you don't use Notion. Pick Granola for bot-free AI meeting notes (Business: $14/user/month). Watch out: team features need Business. Pick ChatGPT Deep Research for multi-step web research reports from inside ChatGPT (Go: $8/month). Watch out: free use is limited; more deep research needs a paid ChatGPT plan. Pick Gemini Deep Research for research reports built from hundreds of web sources, inside the Gemini app (Google AI Plus: $4.99/month). Watch out: more Deep Research use needs Google AI Pro or Ultra. Pick Motion for auto-scheduling tasks into your calendar (Pro AI: $19/seat/month). Watch out: no free plan; billing period for the listed price was not clear on the page. Pick Mem for AI note-taking that organises itself (Mem Plus: $9/month). Watch out: free plan caps new notes.

FAQ

Which of these is cheapest?

Gemini Deep Research Google AI Plus ($4.99/month) is the lowest paid price we verified on this list (https://gemini.google/subscriptions/, checked 19 Oct 2026). Check the vendor page for tax, billing period and usage limits.

Which of these have a free plan?

NotebookLM: Standard chat/generation limits, up to 50 sources per notebook; Notion AI: Free plan includes a trial of Notion AI only; Granola: Basic: $0; ChatGPT Deep Research: ChatGPT Free includes limited deep research; Gemini Deep Research: Free: Deep Research is included in the $0 plan with a Google Account; Mem: Free: 25 new notes/month.

How were these tools chosen?

They are the tools in ToolRank's rankings with a mobile app listed on the vendor site, confirmed on the vendor's own website on 16–19 Oct 2026. Tools we could not verify are left out rather than guessed, and anything unconfirmed is marked Not yet verified.

Sources

Related comparisons

Profiles: NotebookLM · Notion AI · Granola · ChatGPT Deep Research · Gemini Deep Research · Motion · Mem

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