Garmin Forerunner 101 vs Garmin Forerunner 201

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Forerunner 101 compared with Forerunner 201

	GarminForerunner 101	GarminForerunner 201
Overview
Released
Released	2004	2003
Display
Case sizes
Case sizes	83 mm	82.8 mm
Panel
Panel	–	LCD
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	Backlit 36.49 × 23.35 mm monochrome display, 100 × 64 pixels, operated with physical buttons. Garmin does not identify the panel technology.	Backlit monochrome LCD, 36.49 × 23.35 mm and 100 × 64 pixels, with buttons beside and below the screen.
Health and fitness
ECG
ECG	No	No
Blood oxygen
Blood oxygen	No	No
Skin temperature
Skin temperature	No	No
Sleep apnoea alerts
Sleep apnoea alerts	No	No
High blood pressure alerts
High blood pressure alerts	No	No
Body composition
Body composition	No	No
Fall detection
Fall detection	No	No
Crash detection
Crash detection	No	No
GPS
GPS	Single-band	Single-band
Sensors
Sensors	Twelve-channel GPS receiver with built-in patch antenna; no heart-rate or cadence sensor support.	Built-in 12-channel GPS receiver and patch antenna; no heart-rate sensor.
Fitness features
Fitness features	Time, distance, pace and calorie tracking; Virtual Partner, interval training, Auto Pause, Auto Lap and pace, time and distance alerts.	Speed, pace, distance, laps, elevation and calories; Auto Pause, Auto Lap, interval training, pace and distance alerts, and Virtual Partner goals.
Safety features
Safety features	Stores 100 locations and offers basic route display and navigation back to the start; no detailed base maps.	Stores up to 100 locations and can guide the wearer back to the starting point; a basic route map and pointer are shown on the screen.
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 15 hours	Up to 15 hours
Mobile data option
Mobile data option	No	No
Works with
Works with	No phone pairing	No phone pairing
Battery life detail
Battery life detail	Two replaceable 1.5 V AAA batteries; fourteen to fifteen hours of typical use according to the owner's manual.	Rechargeable lithium-ion battery, up to fifteen hours of typical use.
Charging
Charging	–	A/C desktop cradle with charging and computer data contacts.
Connectivity
Connectivity	No computer interface or direct phone pairing; history is viewed on the watch.	Serial port connection to a PC for Garmin Training Center transfers; no direct phone connection.
Storage
Storage	Up to 5,000 laps and approximately two years of training history.	Up to 5,000 laps, with approximately two years of training history in Garmin's 2004 specification.
Design
Weight (lightest version)
Weight (lightest version)	74 g (better)	78 g
Software
Software	Garmin	Garmin
Case materials
Case materials	High-impact plastic alloy housing; IPX7 immersion protection, one metre for thirty minutes. This is not a swimming watch.	Sealed high-impact plastic alloy case with a textile wrist strap; IPX7 immersion rating, tested to 1 m for 30 minutes, rather than a swimming depth rating.
Size
Size	83 × 43.5 × 23 mm; 74 g including batteries, according to Garmin's series datasheet. Width is used as the case size.	82.80 × 43.44 × 17.53 mm and approximately 78 g. The widest case dimension appears in the size comparison.
In the box
In the box	–	Watch, wrist and expander straps, A/C charging cradle with PC interface and manual.
Bands
Bands	Adjustable wrist strap.	–