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STRUCTURED SYNTHESIS

One page that synthesises what you actually wrote

Kept transforms weeks of scattered entries into a single structured page. Every number is counted on device, quotes are extracted verbatim from your sentences, and three questions guide your reflection.

How it works

Instead of forcing you to re-read dozens of entries before a therapy appointment or weekly review, Kept compiles a one-page summary on the cadence you choose. It provides counted evidence of your habits and highlights recurring themes.

Technical implementation

Deterministic Metric Computation

Your iPhone calculates concrete metrics locally: writing frequency, active days, word counts, and candidate sentences before any summary request.

Structural Anti-Hallucination Pipeline

The language model returns quote candidate indices rather than raw text, making paraphrase hallucinations impossible. Any generated reflection containing a digit is discarded so unverified numbers never appear.

Ephemeral Stateless Gateway

When you tap to generate a summary, only the entries from that period are transmitted via Convex to OpenRouter. No entry text is stored remotely and nothing is retained for model training.

Resilient Failure Degradation

If the network is unavailable or quota is spent, Kept produces a complete, structured summary page from on-device computed facts rather than failing.

Technical specifications

AttributeSpecification
Deliverable FormatOne-page structured sheet
Figures ComputedOn-device deterministically
Quotation GuardIndex-based selection (No text synthesis)
Digit GuardAutomatic rejection of synthesized numbers
Inference ProviderOpenRouter (Ephemeral)
Rate Limit4 summaries per device per day

Frequently asked questions

Are summaries generated automatically in the background?+

No. Summaries are generated only when you explicitly tap to request one upon opening the app.

Can I turn off summaries completely?+

Yes. If you choose not to generate summaries, nothing leaves your device at all.

Explore other architecture deep dives

Ready to start with Kept?

Free to write, always. Encrypted on your device.

Download on the App Store