AI-first note-taking with self-organising tags — beautiful idea, narrow execution, no real task layer.
Mem.ai is an AI-first note-taking app with self-organising tags and AI chat over your own content. It's not a task manager — no projects, no priorities, no due dates, no calendar, no habits. LemTask is the productivity layer. Realistic answer for most readers: use both. Mem stores and recalls knowledge; LemTask runs your day, week and motivation loop on top of it.
Gamified task management with voice input, AI suggestions, and fun productivity features.
Knowledge workers who write a lot and want AI to surface old notes contextually.
| Detail | 🍋 LemTask | Mem.ai |
|---|---|---|
| Starting price | Free, Pro $14.99/mo | Free, Mem X $14.99/mo (or $10/mo annual) |
| Free tier limits | 10 active tasks, full AI + voice + gamification | Limited capture, no AI chat |
| Supported platforms | Web, iOS, Android, Mac, Windows, PWA | Mac, iOS, Web (Android beta) |
| Integrations | Google Calendar, Slack, Chrome, webhooks | Slack, iMessage, email forwarding |
| Languages | 9 (per-user) | English only |
| Founded | 2024 | 2020 |
| Best for | End-to-end personal + team productivity | Knowledge workers who write a lot |
| Feature | 🍋 LemTask | Mem.ai |
|---|---|---|
| Per-User Language (9 languages) | Workspace-wide only | |
| AI over your own content | AI suggestions + voice | |
| Self-organising tags | Manual + NLP auto-tagging | |
| Note-taking | LemNotes integrated | |
| Tasks with due dates + priorities | Basic todos only | |
| Habit tracking | ||
| Focus / Pomodoro timer | ||
| Calendar view | ||
| Gamification & XP | ||
| Native Android app | ||
| Free tier | 10 active tasks, full features | Limited capture, no AI chat |
Mem.ai pioneered the AI-first note-taking category and the self-organising knowledge graph is genuinely magical when it works. It's also not a task manager and has never claimed to be one. Mem is to notes what LemTask is to tasks. Many users (including the LemTask team) run both. We include this comparison because the queries collide in search around 'AI productivity tool', not because the apps overlap functionally.
We built LemTask, so we'd love to say it wins everywhere. It doesn't. Here's where Mem.ai is the better pick — honestly.
AI search over your own notes is best-in-class — surfaces a relevant old thought while you're writing a new one.
Self-organising tags genuinely reduce the 'where do I file this' decision fatigue.
Capture latency on Mac/iOS is among the fastest of any note app.
Mem X chat lets you ask questions of your full note library and gets useful answers most of the time.
Mem is AI notes. LemTask is AI productivity. They overlap but don't compete.
Projects, priorities, calendar, focus and habits — Mem has none.
Native Android + Windows — Mem is Mac/iOS focused.
Mem's AI-over-your-notes is best-in-class for that specific workflow.
"Mem made my notes smarter. LemTask made my days more focused. I use both, and they don't fight."
— Lior B., Researcher
Switched from Mem.ai
Spin the wheel and see who wins each feature matchup!
A quick, no-data-loss migration in a few steps.
If Mem is solving your knowledge-recall problem, don't migrate — use both. They don't overlap.
Sign up free at lemtask.com. Capture the work surrounding your notes: tasks to write, follow-ups to send, habits to maintain.
LemTask's built-in LemNotes module covers daily journaling, meeting notes and quick capture. Use Mem for the big knowledge graph; use LemNotes for notes that turn into tasks.
Two-way sync (Pro plan) so meeting prep tasks live next to the meetings themselves. Mem doesn't touch your calendar.
No — Mem is an AI-first note-taking app. There are basic todos inside notes, but no projects, priorities, due dates, calendar view or habit tracker. Mem's strength is AI search and chat over your own knowledge base. For actual task management, you'll want a dedicated app like LemTask running alongside it.
Almost certainly both. They don't overlap. Mem solves 'I can't find that thought I had three months ago'. LemTask solves 'I can't keep track of what I'm doing this week'. The realistic setup is Mem Free or Mem X for notes plus LemTask Free or Pro for daily planning, focus and habits. Total cost stays reasonable on free tiers.
Not at the same depth. LemNotes (our built-in notes module) supports keyword and tag search, plus AI for content extraction and summarisation. Mem's continuous AI chat over your full note library is genuinely deeper — that's their core product. If 'ask my notes' is a daily workflow, Mem wins.
Partially. Mem exports as Markdown — paste each note into a LemNote in LemTask, or use the bulk Import → Markdown option (Pro plan) to import a folder at once. You'll lose Mem's AI tags but keep the content. Most users keep notes in Mem and only import the ones that turn into actual work.
Same price tier. Mem X is $14.99/month (or $10/month annual). LemTask Pro is $14.99/month. Different scope — Mem X is AI-first notes; LemTask Pro is full productivity stack with habits, focus, gamification and team features. If you only need one, pick by what you'll use more daily.
No — Mem is purely a knowledge tool. There's no habit tracker, no Pomodoro timer, no streaks or gamification, no calendar view. LemTask bundles all of these into the same app on the free tier, which removes the need for two or three separate productivity subscriptions.
Yes — full native Android, plus iOS, Mac, Windows and Web. Mem is Mac/iOS first with a Web app and Android still in beta as of April 2026. If you're an Android-primary user, LemTask is the meaningfully more reliable mobile experience today.
If you're on Apple Notes, Notion or plain Markdown for notes and the recall problem genuinely bothers you, Mem can replace them. If you're on Obsidian or Roam and value your manual structure, you'll likely keep both. Mem is best when you write a lot and want AI to handle the filing — not when you want strict control over your knowledge graph.
Join thousands who've made the switch to LemTask
Start Free TrialWe use both LemTask and the competing app daily across personal and team workflows. Pricing is taken directly from each vendor's public pricing page on the date listed below. Feature parity is checked by attempting the same job-to-be-done in both apps (capture, plan, execute, review). When a feature exists but is gated behind a higher tier, we say so explicitly. We also re-read the most recent G2, Reddit and Product Hunt threads about the competitor before publishing.