Sivra · Verified Answer Engine

Answers you can
stand behind

Ask a question. Sivra investigates it across sources, tests every claim against the evidence it fetched, and delivers one clear answer you can trace. Anything it can't trace to a source doesn't make it in.

This is what an answer looks like

Inquiry · Survey depth

Does caffeine improve athletic performance?

Confidence 0.8723 sources6 peer-reviewed

Yes — for most people, meaningfully. Moderate doses of caffeine (3–6 mg/kg, taken 45–60 minutes before exercise) reliably improve endurance and high-intensity performance, with smaller effects on maximal strength. The effect is one of the most replicated findings in sports science.

Every claim traces to a fetched source.Answer lens

Not a wall of links. Not a chatbot's best guess.One answer, a confidence you can see, and the evidence to check it.

How it works

Not a chatbot. An investigation.

01

Ask

One question, in plain language. Sivra plans the investigation and shows you the plan before it starts.

02

Verify

It searches across the web, institutions, and peer-reviewed research — then tests every claim against the evidence it actually fetched.

03

Answer

One direct answer with a stated confidence, and three lenses beneath it: Evidence, Caution, Action.

Depth, with honest timing

You choose how deep it goes

Glance

1 credit · ~2 minutes

One pass. A direct answer when you need it quickly.

Survey

2 credits · ~5 minutes

Two passes. More sources, tighter verification.

Expedition

3 credits · ~10 minutes

Three passes. The full picture, claim by claim.

Real verification takes minutes, not milliseconds. Sivra tells you how long — and works in the background.

Constellation

Everything you verify,
connected

Every answer joins your Constellation — a map of what Sivra has verified for you.

Ask across all of it at once: your past inquiries become one queryable body of knowledge.

Related answers link themselves. The more you ask, the more it connects.

WATCHED · re-checked weekly

Does caffeine improve athletic performance?

Evidence changedConfidence 0.87 → 0.84

New randomized trial on habitual users added to Evidence. Caution updated.

Watched answers

Answers that
stay alive

Watch any answer and Sivra re-checks it weekly — and tells you when the evidence moves, not just that it moved.

The rule

Anything Sivra can't trace to a source doesn't make it in.

AI can be wrong. That's why Sivra shows its work — so you can check anything load-bearing before you rely on it.

Made for iPhone and iPad

Ask from anywhere, watch answers evolve, and carry your Constellation with you. Verification runs in the background and taps you on the shoulder when the answer is ready.

Download on the App Store

Free to download · +2 bonus credits when you sign in · no subscription

Pricing

Pay per answer. No subscription.

Credits are the only currency. One credit is one Glance; deeper inquiries cost more because they do more. Buy a pack when you run low — it never expires and never renews.

Start free3 credits on signup
Get the iOS app+2 bonus credits, once
Glance1 credit · ~2 min
Survey2 credits · ~5 min
Expedition3 credits · ~10 min
 

3

credits

$5.99

$2.00/credit

Popular

5

credits

$8.99

$1.80/credit

 

10

credits

$14.99

$1.50/credit

 

25

credits

$29.99

$1.20/credit

Start with 3 free credits

Same credits everywhere: buy on the web or in the app — one account, one balance, every answer synced.

Sivra — Answers you can stand behind