CorviHow we measure Corvi's speed
Last updated: 2026-10-29
Corvi measures the time from the moment you press Fn to the moment the first word of the summary is spoken. So far we have only a handful of measurements, all from our own testing: in October 2026 the first word came after 3.7, 4.3 and 12.1 seconds. That's too few to advertise a speed, so the site says "within seconds" until we have enough real-world data.
What we measure
When you tap Fn to hear a summary, Corvi records how many seconds passed between the key press and the first spoken word, and which AI service produced the summary. If you allow usage and error logs (Settings › Privacy), this number is sent to us, without the content you were reading. You can turn this off at any time.
The time depends on:
- The length of the content: a short message is faster than a 40-minute video transcript.
- The AI service that summarizes it: some answer faster than others, and Corvi switches when one is slow.
- Your connection.
- Videos without captions: having an AI model watch a video takes noticeably longer.
What we found so far
| Date | Measurements | Mac installs | Fastest | Median | Slowest |
|---|---|---|---|---|---|
| 28 October 2026 | 3 | 1 (our own testing) | 3.7 s | 4.3 s | 12.1 s |
These numbers are honest but not representative: three measurements from one Mac. We will update this table every month as measurements from real use come in, and we'll only put a speed figure on the homepage once it's based on a meaningful number of measurements.
Why we publish this
Speed claims are easy to make and hard to check. We'd rather show you how we measure, and the actual numbers, than print a figure we can't back up. The same rule applies to everything else we say about Corvi: if it's a number, it comes with where it's from.
Other figures on this site
- 35 languages: the languages Corvi's interface, summaries, questions and dictation support, listed on listen in your own language.
- Typing, speaking and reading speeds in our guides come from published studies, linked where they're used: Stanford (2016) on speech vs phone typing, Dhakal et al. (2018) on typing speed, Brysbaert (2019) on reading speed.
Frequently asked questions
Do you see what I was reading when you measure speed?
No. The measurement contains the time and the AI service used, not the content.
Can I turn the measurement off?
Yes, under Settings › Privacy › share usage and error logs.