Comparison

Pocket Brain vs LumenDoc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Pocket Brain

Capture and organize your thoughts effortlessly with an AI-powered second brain. Speak or type ideas, reminders, and to-do lists, and let smart AI automatically sort them. Easily retrieve information by asking natural language questions.

Highlights
  • Capture ideas by voice or text
  • AI-organized knowledge base
  • Chat with your notes
  • Natural language search
  • Centralized storage for all thoughts
  • Private and secure data
Features
Read full description

Boost your productivity with Pocket Brain – the fast, AI-powered second brain in your pocket. Whether it's an idea, a reminder, a to-do list, or a random thought—Pocket Brain lets you speak or type it instantly, then automatically organizes everything for you using smart AI. Need to find something later? Just ask. Pocket Brain understands natural language and brings together related thoughts, even if they were saved weeks apart. Key Features - Capture ideas fast by voice or text No more forgotten thoughts. Just open the app, speak, and it's saved. - AI organizes your knowledge for you Your notes are sorted automatically—no tags or folders needed. - Chat with your second brain Ask questions like “What were my business ideas last month?” or “What books do I want to read?” and get instant answers. - Smart search & retrieval Forget keywords—just describe what you're looking for in your own words. - Save everything in one place Ideas, lists, plans, reflections—anything you want to remember. - Private. Secure. Yours. Your thoughts belong to you. Volty ensures your data is stored securely and privately. Perfect for: - Entrepreneurs & creatives capturing spontaneous ideas - Students organizing notes and study material - Busy professionals keeping track of tasks, meetings, and insights - Anyone building a personal knowledge base Don’t let your best thoughts slip away. Pocket Brain is the fastest way to capture, organize, and access your knowledge.

About

LumenDoc

Transform your paperwork into a searchable digital library. Scan documents, extract key information with AI, and ask questions to find details instantly. Set reminders for important dates and track spending without linking bank accounts.

Highlights
  • Scan documents with AI Vision
  • Ask questions about your documents
  • Track spending from receipts
  • Set reminders and calendar events
  • Private iCloud backup (Pro)
  • On-device OCR fallback
Read full description

LumenDoc turns receipts, bills, medical letters, warranties, contracts and everyday paperwork into a searchable document library. Scan a page, let AI Vision extract the details, track what you spend, and turn important dates into reminders or calendar events. WHY LUMENDOC SCAN PAPERWORK FAST Capture receipts, bills, IDs, school forms, appointments and important letters with your iPhone camera. LumenDoc extracts text, dates, amounts, vendors and document categories so your library is useful from the first scan. ASK YOUR DOCUMENTS Instead of digging through folders, ask questions like: - When is my appointment? - How much did I spend at Coles? - Where is the warranty for my appliance? LumenDoc answers from your own scanned documents and links back to the source. TRACK SPENDING FROM RECEIPTS AND BILLS Receipts, invoices, bills and fines can feed a spending dashboard automatically. See totals, merchants, categories and trends without connecting a bank account. REMINDERS AND CALENDAR INTEGRATION Turn due dates, appointments, renewals and expiries into reminders or calendar events so bills, warranties, appointments and important follow-ups do not get lost. DESIGNED FOR PRIVACY Your scanned page images stay on your device after AI Vision OCR. LumenDoc sends document images to Google Gemini through our private backend only when AI Vision is used for scanning. Library Ask sends relevant OCR text excerpts, not your page images. Your data is not used to train AI models. FREE AND PRO Free includes 5 lifetime AI Vision scans and 15 lifetime Library Ask questions. Free counters do not reset. LumenDoc Pro includes 100 AI Vision scans per subscription cycle, unlimited Library Ask, full spending history and private iCloud backup. After a Pro user's AI Vision quota is used, scanning continues with on-device OCR until the quota resets on the billing anniversary. Subscriptions are managed by Apple through the App Store. Cancel any time in iOS Settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lumendoc.net/privacy

Screenshots

Pocket Brain4 screens
LumenDoc4 screens

Verdict

The call

The clearest difference is in-app purchases: Pocket Brain at none against LumenDoc's 2. Pocket Brain also leads on update cadence (every 8 days vs every 3 months) and iOS requirement (14.0 vs 17.0). LumenDoc's advantage is ads (none vs shown). On price, rating, ratings volume and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. LumenDoc sells 2 in-app purchases, starting at $4.99 per month. Pocket Brain asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Pocket Brain against 5.0 for LumenDoc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Pocket Brain ships an update every 8 days, LumenDoc every 3 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard5 real differences · 5 level
Pocket Brain versus LumenDoc: the parameters behind the verdict, then further details
ParameterPocket BrainLumenDoc
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings11
Update frequencyEvery 8 days — betterEvery 3 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFreemium
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better17.0
Further details — not scored
Size44 MB7 MB
Age rating4+4+
DeveloperMIGUEL ALVAREZ LESMESDavid Mendez

In-app purchases

None

Pocket Brain

No in-app purchases

2 purchases

LumenDoc

Subscriptions2
  • LumenDoc Pro7 Days trial$4.991 Month
  • LumenDoc Pro Yearly7 Days trial$39.991 Year

Questions

Is Pocket Brain free?
Pocket Brain is free to download, with no in-app purchases.
Is LumenDoc free?
LumenDoc is free to download, with in-app purchases available.
Which has better reviews, Pocket Brain or LumenDoc?
Pocket Brain and LumenDoc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Pocket Brain or LumenDoc have ads?
Pocket Brain shows ads; LumenDoc does not.
Which is updated more often, Pocket Brain or LumenDoc?
Pocket Brain ships an update every 8 days, and LumenDoc every 3 months. Most recently, Pocket Brain was updated on October 30, 2026 and LumenDoc on November 5, 2026.

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