Duo Book Dictionary
25 days old
Duo Book Dictionary is #32 in Books Paid in China and charting in 1 of 30 countries we track.
Updated 24 Oct 2026 · rankings refresh through the day
DeveloperAlexander Kvamme
CategoryBooks
Price8.00 CNY
Released
Rating★ 0.0 (0)
Version1.0
Age rating4+
First seen by us
10 Oct 2026
10 Oct 2026Rating
0.0 ★
0 ratings
Measured
Best rank now
#32
Books PaidMeasured
Duo Book Dictionary on the App Store
App details
App ID
6813875288
Publisher
Alexander Kvamme
On the store since
Sep 2026
Under a year
Minimum OS
iOS 18.0+
iPhone XS and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
64 MB
Also listed in
Books, Education
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| China | BooksPaid | #32 |
Apps near Duo Book Dictionary on the chart
Books Paid, around #32.
Ratings
App Store, worldwide.
Rating
0.0 ★
0 ratings
Measured
Ratings
0
Measured
About Duo Book Dictionary
Read a real book in the language you are learning, and never leave the page to look a word up.
Tap a word and its meaning appears. Hold a sentence and the whole passage comes back in English. Both answers come from the device itself — the Spanish dictionary is built into the app, and the translation is Apple's own, running on your phone.
TWO LIBRARIES, BOTH FREE
Project Gutenberg's classics, on shelves for popular, short, kids, tales and adventure. Bloom Library's levelled readers, graded one to four for people just starting. Every book is free and openly licensed. Nothing to buy, no account to make.
SORTED BY HOW HARD IT READS
Neither catalogue publishes a difficulty rating, so this app works one out from the book's own sentences. Shelves come back easiest first, which means you can start where you can cope and climb.
EIGHT LANGUAGES
Spanish, French, German, Italian, Portuguese, Russian, Dutch and English. Spanish carries a full dictionary inside the app, so it works with no signal at all; the others look up against Wiktionary.
EVERY WORD YOU PICKED
Words, sentences and passages you asked about are kept together in one deck, in the order you met them — so finishing a book leaves you with a list worth going back over.
SET THE PAGE
Type size, typeface and paper colour, all on one screen, shown over a paragraph set the way your book will be.
PRIVATE BY DEFAULT
No account, no sign-in, no tracking, no ads, no analytics. What you read and what you looked up stays on your device.
Books come from Project Gutenberg (public domain) and Bloom Library (CC BY 4.0 and CC BY-SA 4.0), and the built-in Spanish dictionary is drawn from Wiktionary (CC BY-SA 4.0). Every book names its own copyright holder, and the full credits, licences and the changes this app makes to a text are in Settings › Credits.
Tap a word and its meaning appears. Hold a sentence and the whole passage comes back in English. Both answers come from the device itself — the Spanish dictionary is built into the app, and the translation is Apple's own, running on your phone.
TWO LIBRARIES, BOTH FREE
Project Gutenberg's classics, on shelves for popular, short, kids, tales and adventure. Bloom Library's levelled readers, graded one to four for people just starting. Every book is free and openly licensed. Nothing to buy, no account to make.
SORTED BY HOW HARD IT READS
Neither catalogue publishes a difficulty rating, so this app works one out from the book's own sentences. Shelves come back easiest first, which means you can start where you can cope and climb.
EIGHT LANGUAGES
Spanish, French, German, Italian, Portuguese, Russian, Dutch and English. Spanish carries a full dictionary inside the app, so it works with no signal at all; the others look up against Wiktionary.
EVERY WORD YOU PICKED
Words, sentences and passages you asked about are kept together in one deck, in the order you met them — so finishing a book leaves you with a list worth going back over.
SET THE PAGE
Type size, typeface and paper colour, all on one screen, shown over a paragraph set the way your book will be.
PRIVATE BY DEFAULT
No account, no sign-in, no tracking, no ads, no analytics. What you read and what you looked up stays on your device.
Books come from Project Gutenberg (public domain) and Bloom Library (CC BY 4.0 and CC BY-SA 4.0), and the built-in Spanish dictionary is drawn from Wiktionary (CC BY-SA 4.0). Every book names its own copyright holder, and the full credits, licences and the changes this app makes to a text are in Settings › Credits.
Latest updates
1.0