Quick Answer: Yes, you can use TrainerDay on your Peloton Bike or Bike+. TrainerDay is a structured-workout app with more than 20,000 cycling workouts and a generous free tier, and FitSwitch gives it everything it needs from your bike — live power, live cadence, and ERG mode on the Bike+ so the app sets your resistance for you. Without FitSwitch, TrainerDay on a Peloton is just a workout viewer: no watts, no RPM, no automatic resistance.
Table of Contents
- What is TrainerDay?
- Why TrainerDay Needs Bike Data
- Method 1: Manual Sideloading (Without FitSwitch)
- Method 2: The Easy Way with FitSwitch
- TrainerDay vs Other Training Apps on Peloton
- Step-by-Step Comparison
- FAQ
What is TrainerDay?
TrainerDay is an indoor cycling app built around structured training rather than virtual worlds. Instead of riding a game map, you ride intervals: a workout appears as a block profile on screen, and your job is to hit the target watts for each block.
Key TrainerDay Features
- 20,000+ free workouts — One of the largest shared workout libraries anywhere
- Workout creator — Build your own intervals and sync them to your devices
- Training plans — Structured plans that progress week to week (paid tier)
- ERG and slope modes — The app drives your resistance, or you control it manually
- Free to start — You can train without creating an account at all
- Exports everywhere — Push rides to Strava, intervals.icu, TrainingPeaks and others
Why Choose TrainerDay?
Most structured-training platforms cost £10–20 a month. TrainerDay's appeal is that the core of it — thousands of workouts and the ability to run them in ERG mode — is free or close to it. If you want purposeful intervals on your Peloton rather than another streaming subscription, it's one of the cheapest ways to get there.
Why TrainerDay Needs Bike Data
TrainerDay is a training app, not a video player. The entire experience depends on a two-way conversation with your bike:
- Power (watts) — To show whether you're hitting the target for each interval
- Cadence (RPM) — To track your pedalling and guide workout execution
- Trainer control — To set resistance automatically in ERG mode
Without those, the app shows a workout graph and nothing else. No watts to chase, no automatic resistance, no saved ride.
Your Peloton already has the hardware: a calibrated power meter and a cadence sensor, the same ones Peloton uses to score its own classes. The problem is that Peloton keeps them locked inside its own app. The bike doesn't broadcast over FTMS, the Bluetooth standard every training app expects from a smart trainer. That gap is exactly what FitSwitch closes.
Not sure which route to take?
FitSwitch does it in hardware — 55+ apps, automatic resistance, and metrics broadcast to your watch. No sideloading, no developer mode.
See FitSwitch →30-day money-back guaranteeMethod 1: Manual Sideloading (Without FitSwitch)
You can sideload TrainerDay onto a Peloton with ADB (Android Debug Bridge). The app will launch, but it will not see your bike.
What You'll Need
- A Windows or Mac computer
- A USB-C cable
- Android Debug Bridge (ADB) installed
- The TrainerDay APK (and its matching split files — the app is around 365 MB)
- External power-broadcasting pedals or sensors, such as Favero Assioma or Garmin Rally pedals, because nothing from the Peloton itself will reach the app
- About 45 minutes
Step 1: Enable Developer Mode on Peloton
- Tap the three dots in the bottom right corner
- Go to Device Settings → About Tablet
- Tap Build Number 7 times rapidly
- You'll see "You are now a developer!"
- Go back — Developer Options now appears in settings
Step 2: Enable USB Debugging and Install
- In Developer Options, switch on USB debugging
- Connect the tablet to your computer with the USB-C cable
- Accept the debugging prompt on the Peloton screen
- Run
adb install-multiple base.apk split_config.arm64_v8a.apk ...from your computer
The Catch
Sideloading puts the app on the screen and stops there. You still have:
- No power or cadence unless you buy power pedals (£400+)
- No ERG mode, because nothing can control your Peloton's resistance
- No saved rides worth keeping, since there's no data to save
- A fragile setup — Peloton updates can remove sideloaded apps, and a mistake here can brick the tablet
Method 2: The Easy Way with FitSwitch
FitSwitch plugs into your Peloton's USB-C port, reads the bike's own sensors, and hands them to apps like TrainerDay as a standard smart trainer — through the free FitSwitch Bridge companion app on your phone.
What You Need
- FitSwitch device — Plugs into your Peloton's USB-C port
- FitSwitch Bridge app — Free companion app for Android or iPhone
- Download from the App Store or Google Play
- A TrainerDay account — Optional; the app will train you without one
How It Works
FitSwitch reads the Peloton's power meter and cadence sensor directly. The Bridge app rebroadcasts them over Bluetooth FTMS, the protocol TrainerDay already speaks. To TrainerDay, your Peloton simply looks like a smart trainer — one it can read and control.
The result:
- Real watts from the Peloton's own power meter
- Live cadence from the Peloton's own sensor
- ERG mode on the Bike+ — TrainerDay sets the target, the bike applies the resistance
- Heart rate alongside your intervals
- No external pedals or sensors
Step 1: Install TrainerDay on Your Peloton
- Connect FitSwitch to your Peloton's USB-C port
- Follow the installation instructions
- Install TrainerDay from the FitSwitch app library
Step 2: Set Up FitSwitch Bridge
- Open FitSwitch Bridge on your phone and choose Bridge mode
- Let it connect to FitSwitch — you'll see "Connected Device: FitSwitch"
- Leave the app open and on screen while you ride
Step 3: Connect TrainerDay to FitSwitch
- Open TrainerDay on your Peloton
- Tap Settings, then the + beside Add Devices
- Tap Enable Bluetooth Scanning and allow the permission it asks for
- Pick Fitswitch Bridge from the list when it appears
- The entry turns green and shows what it found: Control, Power, Cadence
Step 4: Ride a Workout
- Choose a workout, or tap Quick Start for a free ride
- Select ERG to let TrainerDay hold your target watts, or SLOPE to control resistance yourself
- Press play — your watts and RPM appear live, and on the Bike+ the resistance follows the plan
- Finish, and the ride saves to TrainerDay and on to Strava if you've linked it
TrainerDay vs Other Training Apps on Peloton
| App | Best for | Cost | Works with FitSwitch |
|---|---|---|---|
| TrainerDay | Structured intervals on a budget | Free tier, low-cost paid plan | Yes — power, cadence, ERG |
| TrainerRoad | Guided plans with adaptive training | Subscription | Yes — power, cadence, ERG |
| Zwift | Virtual worlds and group rides | Subscription | Yes — power, cadence, resistance |
| Rouvy | Real-road AR routes | Subscription | Yes — power, cadence, resistance |
| Kinomap | Real video routes | Subscription | Yes — power, cadence, resistance |
TrainerDay is the pick when you want the workout itself rather than the scenery, and when you'd rather not add another monthly subscription to the Peloton one you already pay.
Step-by-Step Comparison
| Manual sideloading | With FitSwitch | |
|---|---|---|
| Time to set up | ~45 minutes | ~5 minutes |
| Computer needed | Yes | No |
| Power and cadence | Only with £400+ power pedals | From the Peloton's own sensors |
| ERG mode | No | Yes, on the Bike+ |
| Survives Peloton updates | Often not | Yes |
| Risk to the tablet | Real | None |
Frequently Asked Questions
Is TrainerDay free?
There's a genuinely usable free tier — thousands of workouts, and you can even start training without creating an account. Training plans and some advanced features sit behind a paid plan, which is still cheaper than most training platforms.
Does ERG mode work with TrainerDay on a Peloton?
Yes, on the Bike+. TrainerDay sends a target wattage and FitSwitch applies it to the bike's resistance motor, so you simply pedal and the bike holds the number. The original Bike has no motorised resistance, so you get full metrics and adjust the knob yourself — use TrainerDay's SLOPE mode or just follow the target on screen.
Does it work on the original Peloton Bike?
Yes, with live power and cadence. What the original Bike can't do is change its own resistance, so automatic ERG is a Bike+ feature. See Bike vs Bike+ for the full difference.
Do I need the FitSwitch Bridge app running?
Yes. The Bridge is what rebroadcasts your bike's data to apps running on the Peloton screen. Open it on your phone before you start and leave it running for the ride.
Will my heart rate show up?
Yes. FitSwitch broadcasts heart rate along with power and cadence, so a connected strap appears in TrainerDay. See heart rate monitors on Peloton.
Do my TrainerDay rides sync to Strava?
Yes. Link Strava inside TrainerDay and completed rides upload automatically, with the power data coming from the Peloton's own meter.
Is the power data accurate?
It's the Peloton's own power meter — the same one scoring your Peloton classes. Nothing is estimated or converted. More on how Peloton calculates power.
Does TrainerDay take up much space on the tablet?
It's a large app, around 365 MB plus room to install. If your Peloton is short on space, remove an app you don't use first — our guide to uninstalling apps shows how.
Can I still take Peloton classes?
Of course. FitSwitch switches between apps in a tap — intervals on TrainerDay today, a Peloton class tomorrow, on the same bike.
Real Intervals, Real Watts, No New Subscription
TrainerDay turns your Peloton into a proper structured-training bike, and FitSwitch gives it the data to work with:
- Live power and cadence from the Peloton's own sensors
- ERG mode on the Bike+, so the bike holds your target watts
- Heart rate alongside every interval
- Rides that save and sync to Strava and friends
- No power pedals, no computer, no sideloading
- Instant switching back to Peloton classes
Stop guessing at resistance levels. Start training to numbers that mean something.
Get FitSwitch — TrainerDay with real power, cadence and ERG on your Peloton.
Installation Instructions | Compatible Apps
Last updated: October 2026
Not sure which route to take?
FitSwitch does it in hardware — 55+ apps, automatic resistance, and metrics broadcast to your watch. No sideloading, no developer mode.
See FitSwitch →30-day money-back guarantee