Comparison

Lumen vs HeyCue

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

Head to head
About

Lumen

This app acts as a browser that remembers what you read, building a personal knowledge base from engaged pages. It allows you to ask questions in plain English about your reading history, with answers generated by an on-device AI. All your data remains private and offline.

Highlights
  • On-device AI knowledge base
  • Plain English questioning
  • Automatic content organization
  • Private and offline browsing
  • Tracker blocking
  • Source citation for answers
Read full description

Lumen is a browser with a memory. Most browsers forget the second you close a tab. Lumen does not. As you read, it quietly builds a personal knowledge base from the pages you actually engage with, and then lets you ask questions about any of it in plain English, answered by an AI model that runs entirely on your device. Nothing you read, nothing you ask, and nothing Lumen learns about you ever leaves your phone. WHAT IT DOES Lumen reads along with you. It distinguishes between pages you genuinely read and pages you opened and swiped away, and it extracts the meaningful content from the ones that stuck. That content gets summarized, embedded, and organized into a searchable knowledge base, all on-device. Later, when you want to find something, you do not have to dig through history or remember which tab it was in. You just ask: "What did I read about sourdough starters last week?" "Summarize that article about the new M-series chips." "What were the main arguments in that piece I read on Tuesday?" Every answer cites the pages it came from, so you can jump straight back to the source. AUTO-ORGANIZED Your reading sorts itself into a clean hierarchy: Topics, Websites, and Pages. Each level carries its own AI-generated summary, so you can scan what you have been learning at a glance. No tagging, no folders to maintain. Lumen handles it in the background. PRIVATE BY DEFAULT Lumen has no server. There is quite literally nothing to send. On-device LLM: a quantized Llama 3.2 model runs locally through Apple's MLX framework. Local SQLite storage: your reading history, summaries, and embeddings never leave the device. Built-in privacy: tracker blocking, third-party cookie blocking, and fingerprint resistance. Secure: HTTPS-only by default, with mixed-content blocking. No strings attached: no accounts, no sync, no telemetry, no ads. The AI weights download once on first launch (~700 MB). After that, everything works fully offline: browsing, reading, asking, answering. BUILT FOR iOS Lumen is written from scratch in Swift and SwiftUI, designed specifically for iPhone and iPad. It uses Apple's own frameworks wherever it can: NLEmbedding for semantic search, WKWebView for browsing, SQLite with FTS5 for full-text queries, and MLX Swift for on-device inference. Zero third-party trackers. Zero external services. WHO IT'S FOR While most browsers treat the web as a feed to scroll past, Lumen treats it as a library worth keeping. If you read a lot online and constantly think "I know I saw something about this recently but I cannot find it again," Lumen is for you. Researchers, students, writers, developers, and lifelong learners. You do not need to change how you browse. Browse normally, and Lumen takes care of the rest. REQUIREMENTS iOS 18 or later. iPhone with Apple Silicon recommended for the fastest on-device AI performance.

About

HeyCue

Features
Read full description

HeyCue is the AI that runs your life admin for you. Connect your bank and inbox, and HeyCue finds forgotten subscriptions, tracks every bill, remembers your car, home, insurance and documents, and keeps your calendar and receipts in one place. Ask it anything — "What did I buy at Target?" or "When does my insurance renew?" — and it answers from your real data. Need a quote? Ask HeyCue to call local vendors for you. WHAT IT DOES • Finds every subscription — from your bank AND your email • Tracks all your bills and warns you before they're due • Remembers your whole life — car, home, insurance, docs, people • Answers questions about your spending and receipts • Scans and itemizes receipts automatically • Keeps your calendar, returns and errands in one place • Can call local vendors to get you quotes WHY IT'S DIFFERENT Most apps just show you a list. HeyCue remembers your life, so it can actually act on it — and it can pick up the phone to get you quotes from local pros. Free to start. Personal ($9.99/mo) and Personal Pro ($19.99/mo) unlock more AI credits, calls and premium integrations. Your data stays yours — connect only what you want. Auto-renewable subscriptions: Personal ($9.99/month) and Personal Pro ($19.99/month). Payment is charged to your Apple ID at confirmation of purchase. Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://heycue.ai/terms.html Privacy Policy: https://heycue.ai/privacy.html

Screenshots

Lumen4 screens
HeyCue4 screens

Verdict

The call

The clearest difference is in-app purchases: Lumen at none against HeyCue's 2. Lumen also leads on ads (none vs shown). HeyCue's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price and update cadence 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. HeyCue sells 2 in-app purchases, starting at $9.99 per month. Lumen asks for nothing beyond the download.

UpkeepUpdate frequency

Lumen ships an update every 2 weeks, HeyCue fortnightly. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

Scorecard4 real differences · 6 level
Lumen versus HeyCue: the parameters behind the verdict, then further details
ParameterLumenHeyCue
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 weeks — betterFortnightly
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.015.1 — better
Further details — not scored
Size28 MB40 MB
Age rating17+4+
DeveloperDaniel KosukhinRippleCue, LLC

In-app purchases

None

Lumen

No in-app purchases

2 purchases

HeyCue

Subscriptions2
  • Personal$9.991 Month
  • Personal Pro$19.991 Month

Questions

Is Lumen free?
Lumen is free to download, with no in-app purchases.
Is HeyCue free?
HeyCue is free to download, with in-app purchases available.
Do Lumen or HeyCue have ads?
HeyCue shows ads; Lumen does not.
Which is updated more often, Lumen or HeyCue?
Lumen ships an update every 2 weeks, and HeyCue fortnightly. Most recently, Lumen was updated on October 14, 2026 and HeyCue on October 20, 2026.

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