Question 1

Does it come with charger or do you have to buy separately?

Accepted Answer

It comes with a charger.  I have not been able to buy it separately.  You have to buy a whole new Flex 2.

Question 2

Will this recognize activity from stationary cycling?

Accepted Answer

I don't think any one of these people really answered your question. It is not going to recognize that you are cycling and it will just run up your step count. I find this to be a problem because I am not taking any steps when I am riding my bike and don't want that counted as walking.

Question 3

do you have to have the app or a phone

Accepted Answer

If your phone is not compatible with the device (as mine was not compatible) then you MUST purchase a dongle to go with this particular tracker as it is not included in the purchase of the Fitbit Flex 2. With a dongle plugged into your computer, you pull up the Fitbit icon on your computer and tell it to sync if it has not synced in a while....but it will sync from time to time on its own. If your phone does work with the tracker, then you just download the app and you are set to go.

Question 4

Does this fitness tracker touch the skin?  If so has anyone with a nickel allergy worn it for a substantial amount of time?

Accepted Answer

I have a severe nickel allergy -- rash, swelling, blisters.  But the Fitbit Flex 2 band doesn't irritate my skin at all, even though I've been wearing it 24/7 since I got it.  Granted, only the two little posts that secure the band (not the tracker itself) have any metal that touches my skin, but usually that would be enough to set my wrist on fire.  When I researched before buying, the only official word I could get from Fitbit said the clasp is surgical grade stainless steel, which by definition shouldn't have any nickel in/on it.

ASIN	B01KH2PV4U
ASIN	B01KH2PV4U
Batteries	1 CR2 batteries required. (included)
Battery Average Life	20 Days
Battery Description	Lithium-Ion Polymer
Best Sellers Rank	#166,536 in Sports, Fitness & Outdoors ( See Top 100 in Sports, Fitness & Outdoors ) #1,115 in Activity Trackers
Brand Name	Fitbit
Colour	Black
Compatible Devices	Smartphones
Customer Reviews	3.6 3.6 out of 5 stars (6,806)
Date First Available	1 January 2017
Global Trade Identification Number	00810351028888
Is Discontinued By Manufacturer	No
Item Dimensions L x W x H	16L x 9W x 11H Millimeters
Item Dimensions LxWxH	25.4 x 1.1 x 0.9 Centimeters
Item Weight	0.04 Pounds
Item Weight	18.1 g
Item model number	FB403BK
Manufacturer	Fitbit
Manufacturer	Fitbit
Manufacturer Part Number	FB403BK
Material Type	Elastomer
Model Number	FB403BK
Net Quantity	1 Count
Product Dimensions	25.4 x 1.14 x 0.94 cm; 18.14 g
Sensor Type	Sleep
Size	Sehr klein
Software Update Supported to Date	unknown
Team Name	Fitbit
UPC	810351028888
Unit Count	1 Count

Fitbit Flex 2 Wireless Activity Tracker and Sleep Wristband (Black)

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