Apps with estimates
0 of 10% of their apps have a 30-day estimate
David Kieffer
iOS apps by David Kieffer, with estimated downloads and revenue.
PublisherUpdated Oct 25, 2026
Avg. rating
4.71Weighted by number of ratings
Apps All 1 of their apps we track.
| App | Category | Downloads · 30D |
|---|---|---|
 ZefSports | Sports | Downloads and revenue for apps outside the free top 300 are part of Pro |
| App | Category | Released | Downloads · 30D |
|---|---|---|---|
| ZefSports | Sports | Jun 5, 2019 | Downloads and revenue for apps outside the free top 300 are part of Pro |
Categories Share of their apps
- Sports100%
About this data: every app of theirs we track. Downloads and revenue are AppTrendKit estimates, not the publisher's own numbers; ratings come from the App Store.