Comparison

Lykke vs GreenDay

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

Head to head
About

Lykke

This app consolidates various idea fragments, from voice notes to screenshots, into a connected, searchable knowledge library. It automatically organizes your captured information and allows instant retrieval through conversational AI, even integrating with other AI assistants.

Highlights
  • Capture voice notes, screenshots, links, and documents
  • Automatic titling, tagging, and connection of notes
  • Instant idea retrieval via conversational AI
  • Integrates with popular AI chat assistants
  • Weekly insights to discover patterns and connections
  • Cross-platform support for iPhone and iPad
Features
Read full description

Learning doesn't happen in one place. It happens in fragments — a link you stumble on, a voice memo between classes, a photo of a whiteboard, an article shared by a friend. The problem has never been finding information. It's bringing it all together — and making it work for you, specifically. That's what Lykke does. Capture any fragment of learning from anywhere on your phone. Lykke pulls it in, organizes it automatically, and connects it to your coursework — building a knowledge base that grows stronger the more you feed it. Once everything is in one place, your learning becomes truly personal: chat with your notes, ask questions out loud, and get answers shaped around what you already know. Bits in. Understanding out. Personal to you. Capture from anywhere, in any form Use the share sheet to send anything to Lykke in one tap — links, screenshots, PDFs, images. Snap a whiteboard photo, use the stylus for handwritten notes, drop a voice memo, or paste a URL. Every format. Every moment. Every source. Auto-organize, so you never have to Lykke titles, and files every capture automatically — linked to the right course, ready to find. No folders. No manual sorting. Just a knowledge base that stays tidy with minimal effort from you. Chat with everything you've captured Once your bits of learning are in one place, Lykke brings them to life. Ask questions, get summaries, connect concepts across subjects. Your notes stop being static — they start answering back, shaped by exactly what you know and where you need to grow. Learn out loud, your way Tap to speak. Lykke's voice mode turns your knowledge base into a conversation built around you. Ask anything, hear an answer shaped by your own captured content. Perfect for commutes, walks, or any moment away from a screen. Never miss a deadline Lykke surfaces your assignments, due dates, and course commitments automatically — so your week is figured out before it starts. Offline, always No signal? No problem. Your entire knowledge base is available offline, anytime, anywhere. Share and collaborate Share captures and notes with classmates instantly. Build knowledge together, not just alone. Part of the Lykke platform Lykke App is your always-on capture companion. Pair it with Lykke on the web to unlock the full picture — personalized learning paths, interactive demos, quizzes, flashcards, infographics, AI-tutor, concept maps, and career-ready interview prep suite, all built on the knowledge base you've been growing on the go. The more you capture, the smarter it gets. The smarter it gets, the faster you learn. That's how learning compounds. Privacy & AI disclosure (required in App Store Connect and in-app) Lykke uses AI to organize, connect, and personalize your captured content. Voice notes, photos, and course material are processed to build and adapt your personal knowledge base. Please review our Privacy Policy for full details on how your data is handled and protected.

About

GreenDay

Read full description

Plan the work. Keep the details close. GreenDay brings tasks, calendars, and rich notes together in a focused workspace. A CLEAR PLAN FOR TODAY Use the sun button to choose what to work on. Unfinished tasks stay on Today until you complete or remove them, even when the day changes. Keep a final deadline separate, and use Upcoming to see what's approaching. LISTS FOR PROJECTS, TAGS FOR CONNECTIONS Give each task a home list. Add sublists for courses, projects, or responsibilities; a parent list brings its sublists' tasks together. Use tags to connect topics across projects. Lists and workflow statuses have distinct icons and customizable colors, and the list chooser makes nested projects easy to recognize. LISTS AND BOARDS THAT FIT THE WORK Switch between task lists and kanban boards. Compact cards keep titles and useful details visible. Organize work into statuses, and undo task completion when plans change. NOTES BESIDE EACH TASK Write Markdown, checklists, tables, and links. Add images and documents, or render inline and display LaTeX equations. Select an equation to edit its source. Open checkboxes gathers unfinished checklist items from active tasks so you can find the next small step. CALENDARS ALONGSIDE TASKS Connect calendars already configured in Apple Calendar, including iCloud and Google accounts. View events beside task deadlines in Month, Week, or Day, and link tasks to events without changing their deadlines. Calendar access is optional. YOUR WORKSPACE, WITH BUILT-IN SYNC Use GreenDay locally without an account. Create an account to import your existing tasks, notes, lists, tags, and attachments into GreenDay Cloud and sync across devices. Signing into an existing account opens its cloud workspace and replaces visible guest tasks without merging them. Changes save locally first, so you can keep working offline. GreenDay syncs changes in the background while the app is open. Existing private workspaces reopen in place after an update; older workspace folders are copied into private local storage with the originals preserved. Custom cloud-drive and shared-folder selection are no longer available. No advertising or analytics SDK is included. Account and sync data are processed by GreenDay’s service on Google Cloud; the privacy policy explains collection and deletion.

Screenshots

Lykke4 screens
GreenDay2 screens

Verdict

The call

The clearest difference is update cadence: GreenDay at daily against Lykke's every 2 weeks. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Lykke ships an update every 2 weeks, GreenDay daily. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
Lykke versus GreenDay: the parameters behind the verdict, then further details
ParameterLykkeGreenDay
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 weeksDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.1 — better16.0
Further details — not scored
Size96 MB6 MB
Age rating4+4+
DeveloperLykke Technologies Inc.Kihyuk Hong

In-app purchases

None

Lykke

No in-app purchases

None

GreenDay

No in-app purchases

Questions

Is Lykke free?
Lykke is free to download, with no in-app purchases.
Is GreenDay free?
GreenDay is free to download, with no in-app purchases.
Do Lykke or GreenDay have ads?
Neither Lykke nor GreenDay shows ads.
Which is updated more often, Lykke or GreenDay?
Lykke ships an update every 2 weeks, and GreenDay daily. Most recently, Lykke was updated on October 13, 2026 and GreenDay on October 9, 2026.

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