Journaling, diary & reflection apps

The backend for journaling apps.

A journaling or diary app needs private per-user storage, streaks, offline-first sync, scheduled writing prompts, media attachments, and subscriptions. Amba provides per-user isolated collections, streaks, an offline queue, scheduled push and daily prompts, media handling, and entitlements as one backend.

Get an API key Read the docsupdated June 12, 2026
or let your agent install it:
Day-One-style diariesgratitude journalsmood & reflection apps

Amba is installed by your coding agent over a hosted MCP server — project provisioned and SDK wired before you finish describing the schema. Journaling apps are private-by-default content stores with a daily-habit loop: a prompt to write, a streak to maintain, offline capture on the go, and a subscription that funds the product. Amba’s per-user collections, content prompts, streaks, offline queue, and economy fit that shape directly. What is an agent-native backend?

what it needs

What a journaling & diary app backend actually needs.

01
Private per-user storage
Collections scoped to the authenticated user by default, so entries are private unless explicitly shared.
02
Streaks
Daily journaling streaks with grace periods.
03
Offline-first sync
An offline queue that buffers entries and replays idempotently on reconnect.
04
Scheduled prompts
A daily writing prompt per user via the content layer and push.
05
Media attachments
Validated uploads with transforms and retention.
06
Subscriptions
Premium tiers gated by entitlement.
how amba covers it

How does Amba keep entries private and synced?

Collections (per-user)
Typed collections scoped per user by default — entries are private, with optional shared mode for global data.
Content prompts
A “one item per user per day” content layer for rotating writing prompts, tracked per user.
Streaks
Declarative daily-journaling streaks with grace and timezone handling.
Offline queue
Opt-in offline buffering replays writes in order, idempotently, on reconnect — no lost entries on a subway.
Media & entitlements
Validated uploads with transforms; premium gated with user.entitled("pro").
questions

Journaling & diary apps backend — FAQ

What backend does a journaling app need?

A journaling app needs private per-user storage, streaks, offline-first sync, scheduled writing prompts, media attachments, and subscriptions. Amba provides per-user collections, streaks, an offline queue, content prompts, media, and entitlements as one backend.

Are journal entries private by default in Amba?

Yes. Amba collections are scoped to the authenticated user by default, so rows are isolated per user; you opt into a shared mode only for global data.

Does Amba support offline journaling?

Yes. Amba’s opt-in offline queue buffers writes on-device when offline and replays them in order, idempotently, when the connection returns — so entries written on a commute aren’t lost.

start in 30 seconds

Hand the docs to your agent.
Ship by lunch.

Read the docs