Pebble · Ring · Ranked #9

Index 01

Name: Index 01
Brand: Pebble
Price: 75 USD
Availability: InStock

The Index 01 runs speech recognition and its language model entirely on your phone for $75, and is the only device here that needs no cloud at all — but it cannot record a room.

Scores

5.6out of 10scored 2026-09-16 · How scores are built

Shipping · $75 · no plan · Manufacturer page

Why this total. Axes are 0–10 in half points; Contributes is score × weight.
Axis	Weight	Score	Contributes	Reasoning
Capture	23%	2.0	0.46	The Index 01's single microphone is tuned for 5–20 cm, and Pebble states plainly that it is not designed to record meetings or ambient audio. As room capture it does not compete.
Intelligence	17%	5.0	0.85	The Index 01 is the only device here running both speech recognition and its language model on-device, but that model picks actions from short dictation rather than summarising a conversation.
Privacy	16%	9.5	1.52	The Index 01 needs no internet connection at all, records only while its button is held with no way to lock it on, and buffers five minutes — short of a 10 because no recording indicator is documented.
Battery	14%	2.5	0.35	The Index 01 never charges, but 12–15 hours is its whole service life rather than a cycle, so it cannot do sustained capture on any day you need it.
Wearability	12%	8.5	1.02	At 4.7 g and 2.95 mm in stainless steel, water resistant to 1 m and never needing a charger, the Index 01 disappears on the finger — hold the button and speak, one-handed, though that is dictation rather than an agent.
Look	7%	8.0	0.56	The Index 01 is a 2.95 mm stainless-steel ring, so it wears as jewellery rather than as a clip, though steel is more tool-like than titanium and the sealed body is plainly a gadget up close.
Value	11%	8.0	0.88	$75 with no subscription is the second-lowest entry price here, though the Index 01 is consumed rather than owned and Pebble offers no exchanges, including for the wrong size.
Total	100%	—	5.6	Weighted sum. See how scores are built.

Index 01 5.6/10

Specifications

Index 01 — specifications. A figure the manufacturer does not publish is printed as Not published, not guessed.
Cost
Price	$75
Plan	None required
Capture
Microphones	1
Capture mode	Press to record
Audio out	None
Battery (active capture)	13 h — Not a charge cycle. Pebble quotes 12–15 hours of recording across the ring's entire life, after which the sealed battery is spent and the ring is replaced.
On-device storage	0.083 h of audio
Speech recognition	On-device
Language model	On-device
Body
Form factor	Ring
Weight	4.7 g
Materials	Stainless steel
Charging case	Not published
Recording indicator	No
Connectivity	Bluetooth
Companion app	iOS, Android, Web
Data export	Yes

What works

Speech recognition and the language model both run on-device; it works in airplane mode
$75 with no subscription, and the companion app's source is published
4.7 g and 2.95 mm, and it never needs charging at all
Export to your own webhook or MCP endpoint, Notion, Obsidian or Apple Reminders

What does not

A 5–20 cm microphone range — it physically cannot capture a meeting
Non-rechargeable — 12–15 hours of lifetime recording, then you replace the ring
No recording indicator of any kind is documented
Pebble warns its own software will have rough edges "for months, if not years"

The Index 01 is the most interesting device in this ranking and close to the lowest-scoring, which is worth explaining rather than glossing over. It does something no other device here manages — runs the entire pipeline, speech recognition and language model both, on your phone with no internet connection — and it does it in a 4.7 g ring that costs $75. It also cannot record a conversation.

What it is

A stainless steel ring, 2.95 mm thick, water resistant to 1 m, with one microphone and one button. Hold the button, speak, release. The audio buffers on the ring for up to five minutes and syncs to your phone over encrypted Bluetooth, where transcription and action selection both happen locally. The companion app is open source.

There is no charger. Pebble uses non-rechargeable silver-oxide cells and quotes 12 to 15 hours of recording across the ring’s whole life — at their testers’ average of about a minute a day, roughly two to three years — after which the app prompts you to order a replacement and mail the old one back.

Living with it

Read the microphone specification before anything else: 5 to 20 cm. That is the distance from your ring to your mouth when you deliberately raise your hand to speak. Pebble is unusually direct about what this means, stating that the device “only records while the button is pressed”, that it is “not designed to record your whole life, or meetings”, and that there is deliberately no way to lock it on. This ranking scores capture at 25%, and a device that cannot capture a room scores near the bottom of it. That is the rubric working, not a misunderstanding of the product.

What the design buys is a privacy posture nothing else here approaches. There is no cloud to trust, because there is no cloud. It works in airplane mode. The app source is public. Audio and transcripts route to your own webhook or MCP endpoint. Covert recording of other people is not a policy commitment but a physical impossibility — someone must hold a button, and the microphone cannot hear across a table anyway.

Two warnings. Pebble says its own software “will undoubtedly have bugs and rough edges for months, if not years”. And the warranty is 30 days against manufacturing defects with no exchanges at all, including for the wrong ring size, on a product testers reported runs small.

Who it is for

People who want a voice note-taker rather than a conversation recorder, and who care more about nothing leaving their phone than about hearing the room. Judged as that, it is excellent and very cheap. Judged as a capture device — which is what this ranking judges — it is last among shipping devices, and the gap is almost entirely the capture axis.

Briefing

Sources

Specifications and scores on this page are checkable against the citations below. A figure the manufacturer does not publish is omitted or printed as Not published, not guessed.