World of Books App
by Shopiago by World of Books Group
- Books
- Free
- Small & simple · 77
- Rating
- 4.0
- 87 ratings
- Top 72%among 230 Books apps
- Last update
- Oct 14, 2026
- Version 8.4
- Size
- 94 MB
- Category
- Books
- Tracked since
- Oct 9, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
Discover the World of Books app!
Ready to dive into the magic of preloved books? Download our app to explore, shop, and rehome your favourite reads all in one easy-to-use space. Join us in giving millions of books a second life each year.
Your go-to book nook, anytime
Shop our ever-growing collection of books, with FREE delivery straight to your door. We’re here to make it easy to find your next favourite story!
Simpler browsing and search
Enjoy smooth scrolling, advanced search, and filters galore to pinpoint exactly what you’re in the mood for. Because finding that perfect read should be half the fun!
Snag exclusive offers just for you!
Unlock discounts, score special deals including our Buy 3, Get Another Free offer, and discover thousands of gems at prices that make your bank account happy.
A checkout that’s fast & fuss-free
With Apple Pay, Shop Pay, PayPal, and secure card payments, your checkout is as quick and easy as your book browsing.
What’s new
Release notes for the latest version, as written by the developer.
- New and improved user accounts
- Easier and faster checkout
- View and keep track of your orders
Rank history
Daily position in the US charts. #1 is at the top.
- Best rank
- #62
- Current rank
- #72
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
77/100
Small & simple
- Developer size100% · 25
Developer: 1 app on the charts
- Audience size100% · 20
Ratings: 87
- App size60% · 10
Size: 94 MB
- Price model10% · 15
Price model: free
- Demand proof80% · 30
Best rank #5, 3 countries
An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2
How the score worksGap check · UK
Is this US chart app missing in UK?
It showed up on a UK chart in the last 30 days, so it is not a gap.
Store not checked yet
This is a candidate, not a verdict. Charts show at most 100 apps, so not charting does not mean no demand. Check the UK store before you decide.
See all gapsVersion history
- 8.4LatestReleased Oct 14, 2026
- 8.3Released Sep 16, 2026