K-9 Mail
com.fsck.k9
FreeIn-app purchasesEveryone
Key numbers
5M+Installs
3.0 / 1KRating
—Released
Oct 6, 2026Updated
Listing text
K-9 Mail is a 100% open source, privacy focused email client for Android
K-9 Mail is an open source email client that works with basically every email provider.Features* 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 you…
Get this app from the API
curl -H "X-API-Key: $API_KEY" \ "https://apiplay.net/api/v1/app?id=com.fsck.k9"
import requests
r = requests.get('https://apiplay.net/api/v1/app', params={'id': 'com.fsck.k9'},
headers={'X-API-Key': API_KEY}, timeout=30)
data = r.json()const res = await fetch('https://apiplay.net/api/v1/app?id=com.fsck.k9', {
headers: { 'X-API-Key': process.env.API_KEY },
});
const data = await res.json();$ch = curl_init('https://apiplay.net/api/v1/app?id=com.fsck.k9');
curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true,
CURLOPT_HTTPHEADER => ['X-API-Key: ' . getenv('API_KEY')]]);
$data = json_decode(curl_exec($ch), true);1,000 free credits a month, no card needed. API reference
Screenshots
Fields in the API response
| Package name | com.fsck.k9 |
|---|---|
| Developer | Mozilla Thunderbird |
| Developer website | k9mail.app |
| Category | Communication |
| Installs (exact) | 9,532,528 |
| Ratings | 99,716 |
| Reviews | 11,062 |
| Price | Free |
| In-app purchases | $5.00 - $200.00 per item |
| Ads | No |
| Content rating | Everyone |
| Current version | 24.0 |
| Requires Android | 6.0 |
| Last update | Oct 6, 2026 |
| Record refreshed | Oct 27, 2026 |
Rating breakdown
534K
411K
39.5K
211K
134K