Live graphing
See measurements move.
Numeric readouts and time-based plots in one place.
Windows desktop software
Live graphing and logging for Brymen multimeters.
Connect over Bluetooth, serial, or BU-86X USB to view live readings, plot trends, export CSV, and save sessions on Windows.
Flexible connections
Connect through Bluetooth, BU-86X USB, or a supported optical serial adapter.
Live graphing
See trends build in real time.
Saved sessions
Save complete .ldsession files and open them again later.
CSV export
Log sessions and open them anywhere.
Large measurement window
Use a separate, resizable display with movable and scalable measurement groups.
Family-aware controls
Available controls follow the connected meter; BM78x tools include device name and password.
Custom styling
Adjust line and marker sizes, choose plot colors and behavior, and switch to dark mode.
Diagnostics and recovery
LastDigit can recover automatically from lost connections and provides detailed connection diagnostics when you need them.
Meter compatibility
One app for Brymen multimeters.
All Brymen multimeters with communication capability are supported. Bluetooth is fully supported, while USB and serial connections are currently in Beta.
BM78x
Bluetooth
BM25x
Serial
BM52x
BU-86X USB
BM82x
BU-86X USB
BM85x
Serial
BM86x
BU-86X USB
Features
See the software in action.
Monitoring mode
Monitoring mode
A full-version readout for value, unit, function, and current meter status.
In-app monitoring view
In-app monitoring view
The same full-version display captured directly from the software window.
CSV export
CSV export
Save sessions for Excel, Python, or MATLAB.
Auto reconnect
Auto reconnect
Recover faster from unexpected connection interruptions.
Charge and discharge curves
Charge and discharge curves
Useful for RC behavior, power rails, and slow signal changes.
Thermal profiling
Thermal profiling
Good for reflow tuning, drift checks, and long-running tests.
Example use cases
- Bench debugging
- Repair and troubleshooting
- Power supply tuning
- Battery and charger testing
- RC charge and discharge curves
- Thermal profiling
- Reflow oven tuning
- Sensor validation
- Long-duration drift logging
- Lab demos and education
Free vs full
Start free. Upgrade later if you want longer sessions and the extra tools.
Both versions include BT, USB, and COM connections, live readings, meter-aware controls, and diagnostics. The full version removes the session limits and unlocks complete session files, the separate display, theme, and plot controls.
| Feature | Free version Live monitoring, short sessions, diagnostics, and basic CSV export. | Full version Everything in free, plus complete session files, full plot controls, the separate window, and dark mode. |
|---|---|---|
| Connections and recovery |
Included
BT, USB, and COM connection flows, plus automatic reconnect after unexpected drops. |
Included
BT, USB, and COM connection flows, plus automatic reconnect after unexpected drops. |
| Live readings and stats |
Included
Live readings, unit, function, status, and session statistics are all shown live. |
Included
Live readings, unit, function, status, and session statistics are all shown live. |
| Meter controls and diagnostics |
Included
Family-aware controls, device information, and connection statistics. BM78x includes name and password tools. |
Included
Family-aware controls, device information, and connection statistics. BM78x includes name and password tools. |
| Plot session depth |
Up to 1500 samples
Live plot is limited to 1500 samples. |
Unlimited
Live plot is unlimited. |
| Manual CSV logging |
100 samples per clear
Manual logging is limited to 100 samples at a time until cleared. |
Unlimited
Manual CSV logging is unlimited. |
| CSV field selection |
Fixed fields
Exports Session time, Display text, and Unit. |
Choose fields
UTC timestamp, Session time, Sample index, Display text, Numeric value, Unit, Function, Status, ASCII state, and Raw flags. |
| Plot controls and appearance |
Basic appearance
Line width and marker size are adjustable. Plot behavior is fixed and color pickers are unavailable. |
Full controls
Configure plot type, axis, roll mode, auto-scale, cursor snap, window, colors, line width, and markers. |
| Full-session files |
Not available
Only the capped manual CSV log can be saved in the free version. |
Available
Save the complete session as CSV or .ldsession, then reopen .ldsession files later. |
| Synced measurement window |
Not available
Free version uses the main app window only. |
Available
Open a resizable synced measurement window for full-screen readings or a separate display. |
| Dark mode |
Light theme only
The free version is light theme only. |
Available
Use light or dark mode. |
| Choose your edition |
Download free version
Start free, then upgrade later for complete session files, unrestricted logging and plotting, the separate display, and the extra controls. |
Buy full version
$19.99 one-time for a lifetime license. |
Download
Put your multimeter on a larger screen.
Independent software for supported 64-bit Windows systems. Not affiliated with or endorsed by Brymen.