FTMS Sim
Fitness machine BLE simulator
$9.99
Stop hunting for a rower, bike or treadmill every time you test your fitness app. FTMS Sim turns your iPhone or iPad into a Bluetooth LE fitness machine that streams spec-correct data, so you spend your time building features instead of decoding byte layouts, borrowing gym equipment or writing your own fake peripheral.
Pick a machine, press start and connect from your app or a Web Bluetooth page. FTMS Sim advertises the Fitness Machine Service (0x1826) and sends data once per second, encoded exactly as the Bluetooth specification describes: correct flags, field order, resolutions and little-endian bytes.
MACHINES
• Rower and ski: stroke rate, stroke count, distance, pace, power, energy, heart rate, elapsed time
• Indoor bike: speed, cadence, distance, resistance, power, energy, heart rate, elapsed time
• Treadmill: speed, distance, incline and ramp angle, elevation gain, energy, power, heart rate, elapsed time
• Cross trainer, step climber and stair climber: step rate, steps, floors, elevation, power, energy, heart rate
SMART TRAINER
• Accepts ERG (target power), target resistance and simulation commands (grade, wind, rolling and wind resistance) through the FTMS Control Point
• Follows the request-control handshake and sends Fitness Machine Status updates, like real hardware
• Road physics turn power and grade into realistic speed
REALISTIC DATA
• Sliders for rate, cadence, power, speed, incline, resistance and heart rate
• Distance, strokes, steps and energy accumulate over time
• Optional noise makes values wander like a real machine
• Pause drops live values to zero while totals hold
MORE PROTOCOLS
• Heart Rate service (0x180D)
• Cycling Power (0x1818) and Cycling Speed and Cadence (0x1816) with crank and wheel revolution data
• Running Speed and Cadence footpod (0x1814)
• Proprietary erg monitor protocol with status, stroke data, force curves, splits and workout summaries
• Smart pulley roller ASCII protocol with heartbeat handling
FOR DEVELOPERS
• Live hex view of the packet being sent
• Event log of subscriptions, commands and writes from your app
• Export the full session log, with every packet sent and received, as a text file
• Custom advertised device name
• Screen stays awake while running
No account, no tracking, no data collected. One purchase, every machine.
Bluetooth is a registered trademark of Bluetooth SIG, Inc. FTMS Sim is not affiliated with any fitness equipment manufacturer.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
We've done some improvements in this version:
• Every option now has a short line explaining what it does. Options that don't apply to the machine you've picked are greyed out and tell you which machines they work with.
• FTMS Sim now remembers your machine, options and slider settings, so everything is as you left it when you come back.
• Your screen no longer turns off while the app is open.
The developer, Atropical AS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Atropical AS
- Size
- 5.8 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Atropical AS
