Download volume alone doesn't determine chart position; velocity does. An app doing 50,000 daily downloads steadily for six months may rank lower than a newcomer doing 30,000 daily downloads but trending up 20% week-over-week. The store algorithms heavily reward acceleration.
This is why marketing pushes — Super Bowl ads, press cycles, TikTok trends — can launch an app to #1 Free within 24-48 hours. The velocity spike is detected, the algorithm rewards it with more organic visibility, which drives more downloads, which locks the momentum in for a few days until the push ends.
The reality of velocity across the catalog is harsher than most operators expect. In MWM's data, roughly 3 in 4 tracked apps are losing downloads in their 7-day vs 28-day window. The median app has velocity of −18.8%, meaning a typical app's last 7 days saw nearly 1 in 5 fewer daily downloads than its trailing 4-week average. Only about a quarter of apps have positive velocity at any given moment.
The top decile is where serious growth lives: +46% velocity or higher means the app's last 7 days saw nearly half-again more daily downloads than the trailing 28-day baseline. The top 1% of apps experience explosive +788% velocity or above — usually a TV mention, viral TikTok, paid push, or news cycle. These moments are short-lived but disproportionately rewarded by the chart algorithm.
The flip side: apps that stop investing in growth often fall faster than they rose, even if their absolute baseline volume is healthy. Chart rank decays when velocity flattens. Watching velocity, not raw download numbers, is what predicts chart movement two to seven days ahead.
Top-decile and top-1% velocity by category
| Category | Median velocity | Top-10% velocity | Top-1% velocity |
|---|---|---|---|
| Lifestyle & Well-being | -17.3% | +20.1% | +353% |
| Game | -21.9% | +27.3% | +581% |
| Productivity & Tools | -16.9% | +31.6% | +712% |
| Media & Entertainment | -20.8% | +30.4% | +697% |
| Education & Knowledge | -18.6% | +27% | +532% |
| Social & Communication | -21.9% | +32% | +723% |