One of the nicer surprises waiting for me when we returned from our summer holiday at the Mediterranean was a small package from Pebble. Inside was the Index 01 (https://repebble.com/index).
I have been using it for a few weeks now and, although calling it a smart ring is technically correct, it is probably not what most people imagine when they hear that term. There is no screen. No heart-rate sensor. No sleep score. No attempt to tell me whether I am stressed, healthy or sufficiently recovered from yesterday. It is basically a ring with a button and a microphone. And I really like it.
Press, speak, forget about it

You wear the Index 01 on a finger — Pebble suggests the index finger, although other fingers can work as well — and use your thumb to press the small button. Then you bring the ring close to your mouth and say whatever you want to remember. “Buy buttermilk.” “Order new sports shoes for my daughter.” “Look up that article about industrial robots.” That sort of thing. The recording is transferred over Bluetooth to the Pebble app on your phone. There it is converted to text and an LLM works out what you meant. A request to buy buttermilk can end up on a shopping list, while the sports shoes become something to remember or do. If the software puts something in the wrong place, you can simply move or correct it in the Pebble app. But in my experience that hardly ever happens.
Dutch works just fine
I use the Index 01 with a Fairphone 6 running /e/OS, the de-Googled operating system based on the open-source version of Android. The same Pebble app connects both my Pebble smartwatch and the Index 01. So far the combination has worked remarkably well. The Bluetooth connection is reliable, activating the microphone is simple and I speak all my messages in Dutch. The speech recognition and LLM have no problem with that. In practice, my little spoken notes almost always end up where I expect them to.
There is something slightly magical about thinking I must remember this, pressing a button, saying five words and then carrying on with whatever I was doing. No phone to unlock. No app to find. No keyboard. That small reduction in friction makes a surprisingly big difference.
No charging
There is another unusual design choice. You cannot charge the Index 01. Pebble put a non-rechargeable battery inside and designed the device for extremely low power consumption. Depending on usage, Pebble says it should last for years. Founder Eric Migicovsky has described his own usage pattern as potentially giving around two years of operation.
Once the battery is empty, it is empty. That sounds strange in a world where seemingly everything needs to be charged every evening. But it also fits the product. The Index 01 isn’t trying to be a tiny computer on your finger. The ring records your voice and sends it to your phone. Most of the clever processing happens there.
I paid roughly €70 plus shipping for mine, although I may have had an early-adopter price. The current listed price is $75, with Pebble indicating a higher regular price later.
Now I want it in Capacities
The next step for me is figuring out how to integrate all this with Capacities.io (https://capacities.io/), which I use as my personal knowledge management system. Capacities has quite a steep learning curve. At least it did for me. Once you begin to understand how it allows you to organise information, however, it becomes very useful. At the same time, I am the first to admit that I am probably still using only a small percentage of what Capacities can actually do.
So perhaps the Index 01 can become part of that workflow as well. Pebble already supports external integrations through webhooks and MCP, the Model Context Protocol. The company explicitly designed the system so people can route notes and actions into their own tools. That sounds promising. I have no idea yet exactly how I will connect it to Capacities. But finding that out seems like a good subject for another blog post.
Technology that mostly leaves me alone
What I like most about the Index 01 is probably what I also like about my Pebble watch. Showing me the time aside, my Pebble watch is mainly there for notifications. That means I don’t have to pick up my phone every time something happens. I decide which notifications are important enough to reach my wrist and largely ignore the rest.
Don’t get me wrong, Pebble does have a huge collection of watch apps and watchfaces — thousands of them — but I have barely explored them. I don’t really need to. For me, the combination of the Pebble watch and Index 01 already does something much more valuable. It creates a relatively quiet technological environment. No constant demands for attention. No device desperately trying to become the center of my life. Just the notifications I have decided I want — plus a small ring that lets me capture a thought before I forget it. That is about as much “smart” as I need from a ring.
Here is the original video in which Pebble founder Eric Migicovsky introduced the Index 01:





