Simple application to read content of Novopen insulin pens using NFC
About this app
Nov Open Reader is a small application to read data from NFC insulin pens from Novo Nordisk : NovoPen 6 and NovoPen Echo Plus.
Put the pen on the NFC reader of your phone to start retrieving its data, which will be simply displayed as a list. By default, doses within a one minute delay will be grouped as one, and first purging dose (2 units or less) will be hidden. Click on a grouped dose to display the details. Long click on the details to delete doses.
Source code available at https://github.com/lcacheux/nov-open-reader
This application is not developed or endorsed by Novo Nordisk.
This application is intended for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding the use of insulin pens, diabete or any other medical condition.
Licensed under Apache-2.0, by Leo Cacheux.
What's New in v1.3.1
Imported from the F-Droid repository index.
- Fix a crash when a pen is deleted while being selected
Version history
Dec 18, 2025 · 17.6 MB · Android API 24–36 · code 10301
Imported from the F-Droid repository index.
- Fix a crash when a pen is deleted while being selected
SHA-256 b60fc1b48338a9f28932813835f38d7bd0afdfca373c5282d8e57482884f73e5
Nov 1, 2025 · 17.6 MB · Android API 24–36 · code 10300
Imported from the F-Droid repository index.
- Update to the last Android SDK version
- Dose details are now displayed inside the list instead of a bottom sheet
- Add an option to delete pens in the pen settings screen
- Add an option to delete individual doses : long click on dose details to choose which doses to
- delete
- Fix a bug where incorrect doses could be fetched
SHA-256 25392877a3eaafbdc31c4e1f4886b741ce70ac84eea9560160cc4d238c36a297
May 24, 2025 · 14.3 MB · Android API 24–34 · code 10200
Imported from the F-Droid repository index.
- Add pen configuration : display name and color can be set in a dedicated menu
- CSV export default filename now include the date and time
- Handle properly the back button when menus, configuration screens and popups are opened
- Fix wrong Material theme used
SHA-256 6934564cc85a65ba83cbe28309673c011df0c8baf32105d0ee2ac5760e004b43
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be net.cacheux.nvp.app is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.3.0a is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Nov Open Reader first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Nov Open Reader, and a listing is removed when the evidence for it stops holding up.
Get Nov Open Reader
Every source we list for net.cacheux.nvp.app is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
b60fc1b48338a9f28932813835f38d7bd0afdfca373c5282d8e57482884f73e5
Signing certificate
85cc13b7cda62d0cd41d15b6bda8cfa95d9d5cc244507ae60efd2dfbd1581217
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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