How does the Bosch eBike Flow app work?

Many people buy “an e-bike with Bosch” assuming there’s only one app that goes with it. That’s not the case. Bosch supports several generations of motor systems simultaneously, and only the most recent one—the Bosch smart system—works with the eBike Flow app. Older bikes use eBike Connect, or simply have no app connectivity at all. The Flow app is the digital cockpit of a modern Bosch bike: pairing, ride data, navigation, assistance modes, software updates, and digital anti-theft protection are all integrated into it. But not everything is free, and not all features work on every model. This article explains what the app does, which bikes it’s compatible with, and what to look out for when buying a refurbished Bosch bike.

Key Points to Remember

• The Flow app works exclusively with the Bosch smart system. If you have a bike with an older-generation Kiox or Nyon display, you'll need eBike Connect; Intuvia and Purion models from that same generation do not pair with any app.
• The basic app is free, but the premium features are not. Pairing, updates, navigation, and eBike Lock are included in the free version; the alarm, GPS tracking, and battery protection are exclusive to Flow+, which often requires additional hardware.
• When buying a used bike, the digital transfer is crucial. The bike must have been removed from the previous owner's account and be ready to be paired; otherwise, it may be locked before you even take it out for your first ride.

Bosch Flow Compared to Older Systems

What is the Bosch eBike Flow app?

The Flow app is the smartphone app designed for bikes equipped with the Bosch smart system. It connects your phone via Bluetooth to the motor, the display, the control unit, and the battery, serving as the link between you and your bike. To use it, you’ll need a SingleKey ID—the Bosch account that also gives you access to other digital services. Without this pairing, your e-bike will work perfectly fine, but you’ll miss out on registration, updates, and all your personalized settings.

It’s important to understand that the app is no longer just a convenience feature—it’s the bike’s control panel. On a Smart System bike, the app determines the motor’s response, the information displayed on the screen, and the ability to activate safety features like eBike Lock. What used to be controlled by a button on the handlebars is now managed right from your pocket.

That said, the app isn't a magic wand. It can't do more than what the motor, display, and installed software version allow. A sleeker interface won't turn a 2021 motor into a sports motor. Anyone hoping that an app will turn an entry-level bike into a performance bike is likely to be disappointed.

Which Bosch bikes are compatible with the Flow app?

This is where the most confusion arises, and where used bike buyers most often make mistakes. “Bosch” sounds like a single system, but it actually encompasses several generations. Two bikes can both be equipped with a Performance Line motor and yet function completely differently in terms of their electronic systems. In my view, this is the biggest blind spot on the used bike market.

The Flow app works exclusively with the Bosch Smart System, the latest generation. If you have an older-generation eBike System 2 bike with a Kiox or Nyon display, you’ll use eBike Connect, a different app. And bikes with an Intuvia display or an older Purion model don’t connect to any app. These are often excellent, reliable bikes, but they remain digitally silent.

How can you tell if a bike is part of the Smart System without checking the specs? Look for the System Controller—a small, round button recessed into the top tube—and the separate Remote LED with its colored lights. The Purion 200, Kiox 300, Kiox 400C, and Kiox 500 displays are part of the Smart System. On the other hand, if you see a large Intuvia display in the center of the handlebars or an older Kiox model, you’re most likely looking at an earlier generation. If you’re unsure, the Bosch or Yamaha comparison article can also help you better understand the differences between the systems.

What can you do with the app, and how much does it cost?

The free basic app covers most of what cyclists need. You can pair and register your bike, install software updates via Bluetooth, plan routes (including routes imported from komoot), adjust the assistance modes within your motor’s limits, and customize your Kiox display. The eBike Lock feature is also included for free: your phone or display then becomes the digital key that unlocks the motor assistance.

One point I always make sure to explain to buyers: eBike Lock is not a physical lock. It disables the motor assistance, but a thief can still pick up the bike and ride off with it. This feature makes your e-bike unattractive and unusable, not impossible to steal. A good mechanical lock is still essential—the lifespan of your Bosch battery deserves to be protected in every way.

Advanced safety features are exclusive to Flow+, the paid subscription. These include the eBike alarm with notifications, GPS tracking, Battery Lock, the ability to share your bike with up to five people, and detailed statistics. Bosch charges €4.99 per month or €39.99 per year for this service after the trial period. Important detail: To take full advantage of the alarm and tracking features, you need not only Flow+ but also a ConnectModule installed on your bike. Without this hardware module, you’re limited to the free features. This is an important distinction that most advertising copy fails to mention: the app appears to offer more features than it actually does for individual buyers.

One feature deserves special attention in the context of the secondhand market. Since early 2026, it has been possible to report a stolen bike directly in the app—and even to report a battery separately as a component. This increases the chances of recovering it, but it also means that when making a purchase, you should check to make sure a bike isn’t already marked as stolen.

What should you look out for when buying a refurbished Bosch product refurbished

When buying a used e-bike, most people check the battery, the motor, and the range. And rightly so—but with a modern Bosch system, a fourth question arises: Is the bike properly transferred digitally? A smart system bike that’s still linked to the previous owner’s account is a problem you only discover once you get home. Bosch advises sellers to remove the bike from their Flow account before the sale, and that’s precisely where things often get stuck in transactions between private individuals.

My pre-purchase checklist is short but non-negotiable. Is the bike actually equipped with the smart system, or an older system? Can it be paired on-site with a new account? Is eBike Lock still active on a key you don’t have? Is the bike reported as stolen? Is a ConnectModule installed if you want the alarm and tracking features? And what kind of display is installed, since that determines your navigation and customization options? To learn more about this topic, our article on the lifespan of the Bosch Performance Line CX motor will give you a comprehensive overview of what to check mechanically.

That, in my opinion, is where the true strength of a refurbished bike dealer lies. A clean digital transfer, a tested battery and motor, and complete transparency about the system’s generation—that’s exactly what’s missing from transactions on classifieds sites, and what a bike that’s been carefully refurbished guarantees. A refurbished smart system bike often gives refurbished access to a better e-bike for the same budget, provided that both the mechanics and the software are in top condition. Explore our selection of refurbished e-bikes to find the model that’s right for you.

FAQ

Do all Bosch bikes work with the Flow app?

No. Only bikes equipped with the Bosch Smart System are compatible with the eBike Flow app. Older bikes with a Kiox or Nyon display use eBike Connect, and models with an Intuvia display or the older Purion display do not connect to any app.

What is the difference between Bosch Flow and eBike Connect?

Flow is the app for the current Bosch smart system. eBike Connect corresponds to the previous-generation eBike System 2 with a Kiox or Nyon display. These are two separate apps that used-bike buyers often confuse. For a more comprehensive comparison of motor systems, our article on choosing between Bosch and Yamaha may be helpful.

Is the Bosch Flow app free?

The basic app is free: pairing, updates, navigation, assistance modes, and eBike Lock are included. For premium features such as the alarm, GPS tracking, and battery protection, you'll need Flow+, which costs €4.99 per month or €39.99 per year after the trial period.

Can I lock my e-bike using the app?

Yes, thanks to the free eBike Lock feature, which disables motor assistance without a valid digital key. For the alarm and GPS tracking, you’ll need eBike Alarm—which requires Flow+ and, in most cases, a ConnectModule installed on the bike. eBike Lock is not a substitute for a mechanical lock.

Can I just add a used Bosch to my account?

Only if the bike is digitally unlocked and is no longer linked to the previous owner’s account. Ask the seller to remove the bike from their Flow account before the sale, and make sure it isn’t reported as stolen. To learn more about component longevity, check out our guide on the lifespan of the Bosch PowerPack 500 battery.

Written by: Jos Mans | Published on: June 22, 2026 | 5-minute read

About the Author: Jos Mans

Jos is both a writer and a cyclist—and more often than not, he does both at the same time. With thousands of kilometers under his belt and just as many words on paper, he combines his two great passions: being on the road and telling stories.