Brandwave

Duolingo ABC vs Libby:Which is more popular?

In September 2026, Libby had more branded searches than Duolingo ABC among reading apps worldwide. Libby had about 550,000 branded searches, while Duolingo ABC had 22,200. Libby made up 9.4% of all reading app searches we track, and Duolingo ABC accounted for 0.38%. When we asked ChatGPT and Google AI Overviews about reading apps, Libby appeared in three of the five answers and Duolingo ABC in one. Libby was mentioned before Duolingo ABC in three out of four answers that named either.

Among reading apps worldwide in September 2026

Who do people search for more?

Libby, about 25 searches for every 1 for Duolingo ABC

Libby 550K searchesDuolingo ABC 22.2K searches

Who does AI mention more?

Libby, mentioned in 3 of 5 answers, Duolingo ABC in 1

Libby in 3 of 5Duolingo ABC in 1 of 5

Who does AI recommend more?

Libby, named ahead of Duolingo ABC in 3 of 4 answers

Libby first in 3Duolingo ABC first in 1

Follow Duolingo ABC vs Libby and get free monthly updates on what changed

By continuing you'll get index updates and occasional product news from Brandwave. Unsubscribe any time. Privacy

Track your brand against a rival →

Top reading apps in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Libby was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Duolingo ABC was mentioned in one out of five: in one of the three ChatGPT answers, but not in either of the two Google AI Overviews. Libby was listed before Duolingo ABC in three out of four answers that named either.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Libby1st
  2. Kindle2nd
  3. Teach Your Monster to Read3rd
  4. Apple Books4th
  5. Reading Eggs5th
  6. Duolingo ABC6th
  7. The StoryGraph7th
  8. Hooked on Phonics8th
  9. Epic–
  10. Raz-Kids–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Kindle3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Libby3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Apple Books3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Reading Eggs2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Teach Your Monster to Read2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • The StoryGraph2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Hooked on Phonics1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Duolingo ABC1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Epic0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Raz-Kids0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about reading apps

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.

Is Duolingo ABC or Libby more popular in search?

This chart shows how often people search Google for Duolingo ABC and Libby by name. Each line represents a brand's share of searches for all ten reading apps we track, month by month, from English-language searches worldwide.

Duolingo ABC and Libby among reading apps worldwide, by month

Share of searches by month for Libby, Duolingo ABC. The figures are in the table below the chart.

View monthly share of searches table
MonthKindleEpicLibbyReading EggsRaz-KidsHooked on PhonicsApple BooksTeach Your Monster to ReadDuolingo ABCThe StoryGraph
Oct 202555.1%9%9%11.1%11.1%1.5%1.5%1.2%0.3%0.24%
Nov 202563.4%7%7%10.4%8.5%1.1%1.1%0.94%0.23%0.19%
Dec 202569.6%6.3%7.7%6.3%6.3%1.3%1.3%0.84%0.25%0.38%
Jan 202662.7%6.9%10.3%6.9%8.4%1.4%1.4%1.1%0.28%0.51%
Feb 202659.9%8.1%9.8%9.8%8.1%1.3%1.3%1.1%0.26%0.26%
Mar 202658.4%7.8%9.6%11.7%7.8%1.3%1.6%1.3%0.26%0.26%
Apr 202662.2%6.8%10.2%8.3%8.3%1.1%1.4%1.1%0.22%0.27%
May 202661.7%6.8%10.1%10.1%6.8%1.7%1.4%0.91%0.27%0.27%
Jun 202669%3.4%9.3%9.3%5.1%1.5%1.2%0.68%0.3%0.3%
Jul 202674.4%1.1%10%6.7%3.7%1.6%1.3%0.49%0.33%0.33%
Aug 202665.4%7.2%10.7%7.2%4.8%1.8%1.4%0.79%0.29%0.35%
Sep 202657.4%11.5%9.4%9.4%7.7%1.6%1.3%1%0.38%0.25%

How has the Duolingo ABC and Libby comparison changed over the last 12 months?

3 findings
  • Libby was ahead of Duolingo ABC in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, Duolingo ABC’s share of searches among reading apps worldwide moved from 0.3% to 0.38%, and its estimated monthly branded searches moved from 18.1K to 22.2K.
  • Across the 12 months ending September 2026, Libby’s share of searches among reading apps worldwide moved from 9% to 9.4%, and its estimated monthly branded searches held steady at 550K.

How did search popularity change for reading apps worldwide in September 2026?

3 changes

  1. In September 2026, Epic overtook Libby to rank 2nd among reading apps worldwide, with 11.5% of the searches.

  2. In September 2026, Libby lost share of searches among reading apps worldwide, from 10.7% to 9.4%.

  3. In September 2026, Duolingo ABC rose from 10th to 9th among reading apps worldwide.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using Duolingo ABC’s and Libby’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Duolingo ABC

1 branded search term

  • duolingoabc

Libby

1 branded search term

  • libby

How the Brand Demand Index is measured

Other head-to-heads among reading apps

Creator with pink hair and a pink jacket

Put your own brand in this comparison

Brandwave tracks your branded demand next to the rival you actually watch, with your campaigns, spend and outcomes on the same timeline.

Start free