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r/Calibre↗

Calibre | eBook management software

The unofficial sub dedicated to the Calibre ebook management software

99k subscribers246 posts / mo in Sep 2026214 authors / mosince 2012

r/Calibre has 99k members (+45% over the last 12 months). It gets about 246 posts a month from 214 people. Top topics: Ebook Management & Readers, Ebook Readers & Management and E-Readers & eBooks.

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Free report

When to post on r/Calibre

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Visitors without an account can open 3 subreddit reports a day. The best time to post on r/Calibre, removal risk and the rest of the report are one step away.

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Size and growth

How r/Calibre has grown

r/Calibre

Subscriber growth

Subscribers over time

+45%in 12 months · +6.8% in 3 months · +1.2% in 1 month
Oct 202698k
Growing98k subscribers
Data since Mar 2018Live · through Oct 2026
r/Calibre

Monthly activity

Posts, comments and authors per month

−7.5%vs Sep 2025 · −6.9% last 3 months vs the 3 before
Sep 2026246
QuieterPeaked at 676 in Feb 2025
Data through Sep 2026 · October usually lands mid-November

What people talk about

Topics and brands on r/Calibre

Top topics

Share of the subreddit's posts

  1. Ebook Management & Readers35%
  2. Ebook Readers & Management2.5%
  3. E-Readers & eBooks2.1%
  4. Kindle Books & Devices1.6%
  5. AudibleIssues1.0%

Brands people mention

Most-mentioned brands and sites, last 12 months

  1. MobileRead Forums
  2. calibre
  3. Apple
  4. Kobo
  5. KindleModding

The full report

Everything else about r/Calibre

Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.

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Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research