Echo
v2.3.1 · 508.8 KB · code 17
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File information
UpdatedFeb 19, 2026
PublishedDec 11, 2020
Packageuk.co.projectneon.echo
Versionv2.3.1 (17)
Size508.8 KB
MD53ee307b9795a304f19158be7f95789e6
Min SDK16
Malware scanTRUSTED
Signature SHA194:91:21:A5:B8:99:13:D4:BF:DF:EF:D1:10:A4:9C:E6:46:71:52:CB
SignerCN=Project Neon, O=Project Neon, L=London, C=GB
Total downloads5,000,000
This version5,000,000
DeveloperProject Neon
Age ratingEveryone
What's new in v2.3.1
* Minor bug fix (Settings take effect immediately even when using your device's back button)
* Updated to new Android permissions model
* Minor UI and accessibility tweaks
We'd love your feedback: [email protected]
* Updated to new Android permissions model
* Minor UI and accessibility tweaks
We'd love your feedback: [email protected]
Security scan
TRUSTED
- Developer signature verified 2026-02-19
- Signature SHA1 94:91:21:A5:B8:99:13:D4:BF:DF:EF:D1:10:A4:9C:E6:46:71:52:CB
- File MD5 3ee307b9795a304f19158be7f95789e6
How to install Echo v2.3.1 on Android API 16+
Takes about 2 minutes. You'll need roughly 508.8 KB of free storage.
- Grab uk.co.projectneon.echo_17.apk — hit the Download button above (508.8 KB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 3ee307b9795a304f…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find uk.co.projectneon.echo_17.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Project Neon, O=Project Neon, L=London, C=GB. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Echo — tap Open on the install screen, or find the Echo icon in your app drawer.
Common install errors for Echo
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android API 16 or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.