Definition
The number of new reviews an app received in the trailing 7 days. The 7-day window is the most sensitive of the three velocity ranges AppRanks publishes (7d, 30d, 90d) — it surfaces the most recent momentum but also the most noise. A v7d of 0 on a previously-active app warrants attention but isn't immediately a problem (review batches arrive irregularly); a v7d of 0 sustained for two consecutive weeks is a real stagnation signal. Conversely, a v7d spike often correlates with a recent feature launch, a press mention, or a marketplace promotion — context worth checking against the app's update history. Compare v7d against v30d to read momentum: v7d × 4 ≈ v30d means flat; v7d × 4 > v30d means accelerating; v7d × 4 < v30d means decelerating from a recent peak.
Where you see it on AppRanks: App page "Ratings and reviews" section, audit page "Review velocity" check.
Why this metric matters
v7d is the earliest signal an app's momentum is changing — useful for tracking the immediate impact of a release, marketing push, or sudden negative event before it shows up in 30-day or 90-day windows. The trade-off is noise: review batches arrive irregularly, so a single low v7d isn't a problem but two consecutive zero weeks usually is. For developers running merchandising experiments, comparing v7d before vs after the change attribution period is the cleanest read on whether the experiment moved real user behavior or just install attempts.
Use cases
- Release-day measurement: v7d after launch vs the prior 4-week average quickly tells whether new users are reviewing the experience positively or holding back.
See also: Example app page with v7d trend · Audit "Review velocity" check