/ Arkos Note — Personal assistant · WhatsApp

Your second brain lives in WhatsApp.

Arkos Note is a personal AI assistant inside WhatsApp that runs your day with real tools: reminders, expenses, lists, memory and your Google Workspace — without installing another app or opening anything.

11 skills

51 real tools

7 días free · no card

Message “hola” on WhatsApp

/ In action

Inside Arkos Note.

/ Arkos Note · features

Your second brain
lives on WhatsApp.

11 skills with 51 real tools. RAG memory on pgvector. Multimodal audio, vision and text. Google Workspace, shared spaces and extensible MCP. One mandatory rule: tool-or-nothing.

11loadable skills

51tools in production

768dim · vector embeddings

"Tool-or-nothing: before saying 'done', a tool MUST have been executed in this same turn to back it up." system prompt · arkos note

Scroll to explore each feature

01 Reminders · Scheduled prompts

Reminders that show up on their own.

One-shot and recurring reminders with rrule + luxon (Mexico timezone). Plus scheduled prompts — the agent executes a full instruction in the future and sends the result. "Every Monday 8am send me my agenda" isn't a reminder: it's the agent running a whole turn for you.

Reminders for someone else (with the contact's permission)
Internal cron (reminderScheduler.ts) recomputes the next occurrence
Cancel or reschedule from chat — open nothing

09:00 CDMX · UTC-6

02 Baúl · RAG memory

A memory that understands what you save.

pgvector with 768-D vector embeddings. Text, links, parsed PDFs, automatically transcribed audio, images analyzed with LLM vision. Semantic search with cosine distance. Per-user or per-space scope.

guardarEnBaul · buscarEnBaul · renombrarItemDelBaul · borrarDelBaul
Files in Cloudflare R2 · vectorized chunks in Postgres
"Where was that cookie recipe?" — and it appears

› —

03 Expenses · Vision OCR

Photo of the ticket → expense logged.

LLM vision extracts amount, merchant and date automatically. Predefined categories (food, transit, services, rent, subscriptions...). Recurrence with RRULE (rent every 30 days, Netflix every month).

Separate accounts: personal · business · trip · roomies
Shared with partner/cofounder — ExpenseShareInvite with roles
Automatic currency conversion · per-category summaries

—

TOTAL —

— —

Merchant —

Account —

Recurring —

LOGGED

04 Google Workspace · Calendar · Gmail · Drive

Calendar, Gmail and Drive — without opening Google.

One OAuth, three services. The agent creates events, drafts emails and uploads/searches files in Drive from the same chat. Encrypted credentials, minimal scopes per service.

Calendar: listarEventosCalendario · crearEventoCalendario
Gmail: enviarCorreo · buscarCorreos (gmail.send scope)
Drive: subirArchivo · listarArchivos · download to chat
Google contacts imported (vCard) and reusable

📅 Google Calendar

jue 4pm

—

✉ Gmail

to—

subject—

—

✓ Sent

▲ Google Drive

⎘ — 0%

05 Conversational lists

Lists that live in the chat.

"Add milk to the grocery list" — done. "Already got the milk" — checked off. No app. No duplicates. Personal or in a shared space.

crearLista · agregarItem · completarItem (auto dedupe)
Grocery, todo, travel, gifts — whatever
Shared in a space: everyone sees and edits

— 0

› —

06 Shared spaces

Personal and team — cleanly split.

Partner, business, project, roomies. Each space has its own lists, expenses, calendar, contacts and integrations. Same agent, same memory — but everything in the right pocket.

Owner/member roles · WhatsApp-template invitations
Reminders with spaceId broadcast to active members
Shared calendar (SpaceCalendar + SpaceEvent)

— —

0lists

0expenses

0events

0contacts

07 MCP · Extensible skills

Plug in your own tools.

ClickUp, Notion, GitHub, Recota — and any HTTP MCP server. API Key or OAuth 2 with auto-refresh. Curated tools per preset, lazy-loaded with load_skill.

Encrypted credentials — only you see them
Personal or space scope (members can invoke)
Curators filter tools per preset (curatedTools.ts)

arkos.note load_skill()

08 Multi-LLM · Circuit breaker

Three providers. Automatic failover.

A fast, economical primary provider. If 3 failures in 60s, the breaker opens for 5 min and following turns jump to the secondary — with the user never noticing. A third provider stays as final backup.

Mid-turn failover — the user never has to retry
Wallet with credits · per-kind markup (LLM · STT · WA · storage)
Per-call telemetry: kind, tokens, cost, latency

Primary fast · default idle

Secondary auto fallback idle

Backup final fallback idle

Failures · 60s 0 / 3

Try it 7 days free.
No card.

Three plans: NOTE · WORKSPACE · OS. Flat-rate, invisible caps, no surprises. If you don't stay, your data is kept untouched for 30 days.

NOTE $99 1 GB · 30 imgs · 50 Gmail/Drive

WORKSPACE $199 5 GB · 100 imgs · 200 Gmail/Drive

OS $350 25 GB · 300 imgs · 800 Gmail/Drive

Start my trial

Frequently asked questions

What is Arkos Note?

It's a personal AI assistant that lives inside WhatsApp and runs real tasks for you: reminders, expenses, lists, memory and your Google Workspace, all by chatting.

Do I need to install an app?

No. Arkos Note works inside WhatsApp, so you don't install anything new: you text it like any contact and it runs what you ask.

Can it log expenses from a photo?

Yes. You send the ticket photo and it extracts merchant, amount and date, and logs it to the account you choose (personal, business or trip), even converting currency.

Does it connect with Google Calendar and Gmail?

Yes. You connect your Google account and from WhatsApp you create Calendar events, send and search Gmail, and upload or download Drive files.

Is there a free trial?

Yes, you can try Arkos Note free for 7 days, no card required.

Let's put Arkos Note to work for you.

Message “hola” on WhatsApp