KDP categories · Top KDP authors
Numberfit: Amazon KDP author data
As of Nov 6, 2026, Numberfit has 59 books on Amazon, 59 of them on a best-seller list in the last 30 days, mostly in Study & Teaching, Mathematics.
59Books on Amazon
59Listed in 30 days
4.2Average rating
| Median price | - |
|---|---|
| Price range (middle 50%) | - |
| Median reviews | 1 |
| Total reviews | 80 |
| New listings (30 days, incl. new editions) | 0 |
| Breakout books (30 days) | 0 |
What stands out
- 100% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
Numberfit's best-ranked books
-
Year 4 - Time - Advanced - Numberfit
by Numberfit
- Price$0
- Rating3.6
- Reviews4
-
Year 4 - Addition - Advanced - Numberfit
by Numberfit
- Price$0
- Rating3.5
- Reviews3
-
Year 6 - Statistics - Advanced - Numberfit
by Numberfit
- Price$0
- Rating5.0
- Reviews3
-
Year 3 - Statistics - Intermediate - Numberfit
by Numberfit
- Price$0
- Rating4.3
- Reviews3
-
Year 4 - Statistics - Advanced - Numberfit
by Numberfit
- Price$0
- Rating5.0
- Reviews2
-
Year 3 - Division - Advanced - Numberfit
by Numberfit
- Price$0
- Rating5.0
- Reviews2
-
Year 5 - Fractions Operations - Advanced - Numberfit
by Numberfit
- Price$0
- Rating5.0
- Reviews2
-
Year 4 - Length - Intermediate - Numberfit
by Numberfit
- Price$0
- Rating3.0
- Reviews2
-
Year 3 - Statistics - Beginner - Numberfit
by Numberfit
- Price$0
- Rating5.0
- Reviews2
-
Year 4 - Decimal Place Value - Advanced - Numberfit
by Numberfit
- Price$0
- Rating5.0
- Reviews2
Main categories
FAQ
How many books does Numberfit have on Amazon?
KDPTop tracks 59 of their books; 59 made an Amazon list in the last 30 days.
Which categories does Numberfit publish in?
Their books chart most often in Study & Teaching, Mathematics.
Has Numberfit released new books recently?
0 new books in the last 30 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.