Beurer BC 21 vs Microlife BP W3 Comfort

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BC 21 compared with BP W3 Comfort

	BeurerBC 21	MicrolifeBP W3 Comfort
Overview
Released
Released	–	–
Measuring
Type
Type	Wrist	Wrist
Clinically validated
Clinically validated	–	Yes
Irregular heartbeat detection
Irregular heartbeat detection	Yes	Yes
AFib detection or ECG
AFib detection or ECG	No	No
Method
Method	Automatic oscillometric wrist measurement during deflation. Exact UK item 65046, EAN 4211125650469; SK2 voice-language version. First-sale date unconfirmed	Automatic oscillometric wrist measurement during inflation with Comfort+; exact current European manual identifies BP3KB1-3E. First on-sale date unresolved
Accuracy
Accuracy	Exact manual display accuracy ±3 mmHg for systolic and diastolic pressure and ±5% for pulse. Systolic range 60–260 mmHg, diastolic 40–199 mmHg and pulse 40–180 beats/minute; cuff-pressure range 0–300 mmHg is separate	Static pressure accuracy ±3 mmHg and pulse ±5% of readout. Current European manual gives systolic 60–255 mmHg, diastolic 40–200 mmHg and pulse 40–199 bpm; older UK manual gives 20–280 mmHg blood pressure and 40–200 bpm. Cuff-pressure display 0–299 mmHg is separate
Clinical validation
Clinical validation	Exact manual gives an unspecified clinical-test maximum permissible standard deviation of 8 mmHg, without identifying a published study. Medaval reports no peer-reviewed clinical validation information for BC 21, but incorrectly labels its measurement site upper arm; exact maker manual establishes wrist measurement. Independently established headline validation omitted	STRIDE BP approves equivalence to W2 Slim, whose 2016 adult validation used ESH-IP 2010 and ANSI/AAMI/ISO 2013; not a separate published W3 Comfort trial. STRIDE lists a 13.5–23 cm cuff. Manufacturer BIHS A/A marketing and current manual ESH/ISO wording are retained as claims, not additional independent trials
Features
Features	Spoken instructions and results in German, English, French, Italian or Turkish for UK item 65046; three volume levels or off. Shared data sheet separately lists item 65040 with English, Spanish, Polish, Arabic and Farsi; those languages are not part of this UK version. Irregular-heartbeat warning, coloured classification scale, date/time, application-error messages and automatic switch-off. No dedicated AFib screening, ECG, movement detection, heart-level position or resting indicator	Ordinary irregular-heartbeat indication, cuff-fit check, arm-movement warning, single-colour blood-pressure classification scale, low-battery indicator and automatic switch-off after approximately one minute. No dedicated AFib algorithm, MAM sequence or electronic wrist-position sensor established
Cuff
Cuff fits
Cuff fits	14–19.5 cm	–
Cuff
Cuff	Attached wrist cuff for 14–19.5 cm circumference. User must position the cuff at heart level; no electronic position guidance	UK product page and its EN-FR 4119 manual give 13.5–23 cm and a soft D-ring wrist cuff. European August 2026 manual instead gives 13.5–21.5 cm despite the European product page still advertising 23 cm. Headline cuff range omitted pending exact supplied revision confirmation; no inferred second hardware model
Connections and memory
Users
Users	2	–
Readings stored
Readings stored	60 per user (better)	30
Bluetooth and app
Bluetooth and app	No	No
Memory
Memory	Two users with 60 dated readings each; oldest overwritten when full. Average of all stored values and morning (05:00–09:00) or evening (18:00–20:00) readings over the latest seven days. Deletion clears the selected user's entire memory	Stores 30 readings with date/time and displays average of all stored readings, excluding suboptimal cuff fit; not specifically the last three. Oldest overwritten when full. Readings retained on cell replacement, clock reset. New reading can be excluded; saved history clears together. Exact controls establish no separate user selector
App
App	No Bluetooth or connection from the monitor. Current Scan & Save support captures displayed values using a smartphone camera into beurer HealthManager Pro; not automatic transfer	–
Power
Power	Two 1.5 V LR03 AAA alkaline batteries; approximately 200 measurements depending on blood pressure and inflation pressure. Battery operation only	Two 1.5 V AAA alkaline cells; approximately 320 measurements with new cells. NiMH cells supported but must be removed and charged externally
Design
Display details
Display details	Non-illuminated LCD with black digits, maker size 3.8 × 4.5 cm. Physical membrane memory and start/stop controls; low-battery indicator. Manual IP22	LCD with ON/OFF, memory and time controls. Older UK manual gives IP20; current European August 2026 revision gives IP22. Revision conflict retained rather than assuming an upgrade applies to every unit
Size
Size	Exact manual and September 2021 data sheet give 87 × 67 × 31 mm (L × W × H) and approximately 105 g without batteries; data sheet specifies cuff included. Current product table instead gives 87 × 67 × 70 mm and 187 g excluding packaging, with weighing conditions unspecified; differences unresolved	81 × 65 × 21 mm; 112 g including batteries
In the box
In the box	Monitor with attached cuff, two AAA batteries, storage box and instructions. Current product page also lists a blood pressure record	Monitor, storage case, two AAA alkaline batteries, instructions and blood-pressure diary. Current range listing establishes catalogue presence, not worldwide stock or first-sale date