These 1 apps lead WordPress Plugin Directory's Book availability category as of September 2026 — ranked by user rating, review count, and audit score, refreshed every 24 hours from the canonical WordPress marketplace listing.
Discover the top-rated book availability apps available on WordPress Plugin Directory. Rankings based on user ratings, review count, and market performance.
This is the curated shortlist — the top-ranked book availability apps. To browse every book availability app on WordPress Plugin Directory, see the full Book availability category.
This list ranks the top 1 WordPress apps classified under Book availability by the source marketplace's own taxonomy — apps appear here only because WordPress Plugin Directory itself tags them in this category, not because of any AppRanks editorial decision. Within the category set, ranking uses a Bayesian-ish blend of average rating × natural log of review count: the formula is rating × ln(reviewCount + 1), so a high-rating-low-review app doesn't leapfrog an established listing on a single 5-star outlier. The blend favors apps that are both well-reviewed AND have an established user base.
AppRanks does not invent a proprietary score for public surfaces — the rank shown mirrors the marketplace's published category position exactly, scraped on a 12-24 hour refresh cycle from the canonical WordPress Plugin Directory listing. The category lookup happens at request time and the page is cached at the edge for 1 hour to absorb traffic spikes; the underlying ranking data refreshes daily so the list stays accurate within one day of any source change. AppRanks does not editorially promote or demote apps based on advertiser or partnership status — the same blend formula applies uniformly across every app on this platform.
8 Degree Availability Calendar
Ranks #1 in the WordPress Plugin Directory book availability category as a mixed-rating listing. Currently has an early-stage review volume (7 reviews, 3.0★ avg). Position holds for the trailing 30-day window.
Pick if: Pick this if you want an emerging book availability option — 8 Degree Availability Calendar ranks #1 on WordPress Plugin Directory and is still building review depth.
Same data as the ranked cards, condensed into a sortable-by-eye grid: rating × review depth × pricing tier across the top 1 book availability apps on WordPress Plugin Directory.
| # | App | Rating | Reviews | Pricing |
|---|---|---|---|---|
| 1 | 8 Degree Availability Calendar | 3.0★ | 7 | — |
Want to compare any two apps in detail (features, ratings trend, pricing plans side-by-side)? Open the head-to-head page from the "Compare to #N" link on each card above. Custom multi-app comparisons, historical rank trajectory, and CSV export are available on a paid plan.
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