What is K-9 Mail's rating?

K-9 Mail is rated 3.0 stars across 99,878 ratings on the Play Store.

K-9 Mail is published by Mozilla Thunderbird, launched on May 06, 2026.

Where does K-9 Mail rank in its category?

K-9 Mail ranks #456 of 22864 apps in Communication, putting it in the top 2.0% by revenue.

How much does K-9 Mail earn?

Q: How much does K-9 Mail earn?

K-9 Mail earns approximately 1.9K per month based on bumetric's ML revenue forecast, calibrated against 22864 comparable Android apps in Communication.

Android app from Mozilla Thunderbird · Communication

ML forecast ★ 3.0 · 100K Free

~1.9K/mo

ML revenue forecast. Calibrated against 22864 apps in this category.

Confidence band

±15%

High — many comparable apps with verified data

At a glance

Earns 11.91× more than the category median (162/mo).
Ranks #456 of 22,864 in Communication (top 2.0% by revenue).
Launched May 06, 2026 · last updated Apr 15, 2026.

What the app looks like

Live screenshots from the Play Store, captured by our snapshot worker. Tap any image to enlarge.

K-9 Mail's revenue trajectory

Forecast revenue from snapshot history. Last 1 months.

Where K-9 Mail sits in Communication

Revenue distribution of 22864 comparable apps. K-9 Mail highlighted.

K-9 Mail vs comparable apps

Revenue trajectory side-by-side. Bold = K-9 Mail, ghosted = peers.

App spec

Version

18.0

Last update

Apr 15, 2026

Launched

May 06, 2026

Price

Free

Monetization

Free

What K-9 Mail actually does (from store listing)

K-9 Mail is an open source email client that works with basically every email provider. <b>Features</b> * supports multiple accounts * Unified Inbox * privacy-friendly (no tracking whatsoever, only connects to your email provider) * automatic background synchronization or push notifications * local and server-side search * OpenPGP email encryption (PGP/MIME) Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP. <b>Support</b> If you're havin…

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Comparable Android apps

The five apps in Communication with the closest revenue to K-9 Mail. Click any to see its detail page.

App	Revenue	Rating	Ratings
Moj A1	1.9K	★ 4.3	67K
Caller ID & Call Blocker	1.9K	★ 4.2	69K
Shadowsocks	1.9K	★ 4.2	67K
Voice Text - Text Voice PRO	1.9K	—	0
Pulse SMS (Phone/Tablet/Web)	1.9K	★ 3.6	82K

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How we calculated this

Each forecast combines App Store rating, ratings count, monetisation model, pricing tier, IAP signals and ad-supported flag. The base estimate is then multiplied by a per-category scaling factor learned from apps with founder-verified MRR. Every number on this page comes from public APIs and bumetric's own snapshot history.

Full methodology covers input variables, accuracy bands per category and how we treat apps without comparable anchors. See also the live data on K-9 Mail's tracker page for current rating, reviews and snapshot timeline.

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