Casio G-Shock GR-B100 Watches

About the Watch in short. Representative of the latest generation G-Shock Gravitymaster with Bluetooth and route logging. Thanks to the large hands and the improved STN electronic panel, the information on the dial is read even in poor visibility conditions. The design of the digital window resembles a glass cockpit, which provides clear visibility around the aircraft. 6 separate buttons are responsible for managing the watch’s functions, but don’t worry about the complexity of the settings – the Bluetooth connection to the smartphone removes all issues, and you can now control the watch directly from the smartphone’s screen. During the flight, the watch records the intermediate points of the route, which can then be viewed in the form of a map in the G-Shock Connect application. The modified alarm timer is set to a specific date, month and even year, and 30 minutes before the event occurs, a countdown is activated with the remaining time displayed on the display. The GR-B100 has a solar battery that does not require replacement and is charged by sunlight and daylight.


Quick Content Guide

  1. Japanese approaches to Tough and Functional Watches in GR-B100 *the most distinctive features in details
  2. General information about the watch *year of first release, model range etc.
  3. GR-B100 Usage Patterns *what the watch is usually meant for
  4. Feedback from Users and Experts *anonymous from different sources
  5. GR-B100 Model Range *in different colors and bands
  6. The most distinctive specs *from our Editorial point of view
  7. Other G-Shock GR Watches *similar by price and functions but different by cases
  8. Official GR-B100 Video *only from Casio Company
  9. G-Shock GR-B100 on the wrist! *only images and only on the wrist
  10. Official GR-B100 Specs *all details and for base version GR-B100-1A2
  11. GR-B100 Comparison Table *with similar G-Shock Watches
  12. Full Photo Gallery *various images

Enjoy Japanese approaches to Tough and Functional Watches!

*some images are about G-Shock 5000/5600 cases, but the technology, approaches, concepts and philosophy remains the same for the whole G-Shock Model Range

Solar Power. None-Stop – A solar panel converts even weak illumination from fluorescent lighting into electric power. A rechargeable battery with a large power storage capacity supports stable operation of various functions with high electricity consumption. You never have to worry about the battery running down because it’s a solar battery. Casio watches with solar technology, receive thermal and electrical energy that recharges the watch batteries through solar panels on the face of the watch.

G-Shock Connected App. This is the basic application for connecting and communicating with a Bluetooth(R) v4.0 enabled CASIO watch.
Pairing your watch with a smartphone enables use of a variety of different Mobile Link functions that greatly enhance the smartphone experience.
The G-SHOCK Connected app also simplifies certain watch operations by letting you perform them on your phone screen.



General Information

Price225$ *average Amazon Price, we may earn commission from purchases
Year of first Release2018
Module Number5536 / Manual
Model RangeGRAVITYMASTER (Developed in response to pilots’ needs, these tough watches offer improved accuracy, strength and practicality. Famous for unique and beautiful aviation design (usually analog) and advanced technologies.)
Battery TypeSolar (G-Shock Batteries)
Buy Battery on Amazon →
Other Divisions the GR-B100 belongs to: *you may find all watches of the division by clicking on the linkG-Shock Ana-Digi
G-Shock Bluetooth
G-Shock Solar

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GR-B100 Usage Patterns *what the watch is usually meant for

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Feedback from Users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

PROs
+ bluetooth
+ easy setup
+ easy to read face and display
+ lighting feature
+ tough solar powered
+ I use this watch on the flight deck and it matches the FMS times in every way, perfect watch to use.
+ a fantastic looking G-Shock and very legible

CONs
– “phone finder” feature sometimes terrible
– it would be a perfect aviation watch if it has triple sensors! The analog hands are important since the low temperature will white out the LCD
– you have to have your location on while using the app to connect to your phone which isn’t a plus
– Casio collects info from your phone, how you use the app & etc.

Feedback from Experts *based on comparison info with similar watches by price, model range, etc.

PROs
+ hourly Time Signal
+ affordable price
+ perfect accuracy. Bluetooth (via phone app)
+ smart feature via G-Shock Connected App
+ 5 alarms
+ 39 time zones
+ solar powered
+ 1/1000-second stopwatch
+ Auto-Back Light
+ multi Day Format
+ multi Language Day

CONs
– mineral Glass
– no Carbon (Carbon Core Guard) material
– no Alpha Gel / Vibration Resistance
– no Altimeter and Barometer
– no Compass
– no Step Tracker
– no Sunrise Sunset
– no Tough MVT

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GR-B100 Model Range *may be updated

*You may find updated information about colors on our G-Shock 2021 New Releases page →

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The most distinctive specs of GR-B100 *Editorial
— 200-meter water resistance
(good for swimming but not for deep diving)
— Full-dot STN display (A large 7 x 33 dot LCD enables clear, high-resolution digital display of the alarm and 1/1000-second stopwatch functions)
— G-SHOCK Connected App (you may manage all watch settings through your phone)
— Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— Mobile link (Wireless linking using Bluetooth(R)) (for time sync with your phone data)
Flight Log (records location and time data during the flight. It’s addictive watching the 3D map display in the app)

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Other G-Shock GR Watches *similar by price and functions but different by cases


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Official GR-B100 Video

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Official Marketing Focus from Casio

G-SHOCK GRAVITYMASTER has long been the timepiece series at the forefront tough timekeeping. Now these new aviation watch models take this one step further with designs that provide the accuracy and function required during flight.
Large hour and minute hands and hour markers improve readability. These models let you schedule up to five flight times, with a seconds unit countdown until the next flight time.
The large LCD is designed in the image of a glass cockpit of a passenger aircraft, which provides pilots with a clear view of information. Five side buttons and a front light button help to simplify operation by providing more direct access to functions.
These models are the first of the G-SHOCK lineup to feature a large 7 × 33-dot LCD, and an ion plated multi-faceted metal bezel, creating the image of a state-of-the-art aircraft. A bi-color molded band adds a definite touch of fashionable elegance.


G-Shock GR-B100 on the wrist!

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Official GR-B100 Specs / Features *for base version GR-B100-1A2

  • Case / bezel material: Resin / Stainless steel
  • Resin Band
  • Neobrite
  • Shock Resistant
  • Mineral Glass
  • 200-meter water resistance
  • Solar powered
  • Double LED light
    LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
  • Mobile link (Wireless linking using Bluetooth®)
  • World time
    39 time zones* (39 cities + coordinated universal time), one-touch UTC time zone, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
    *May be updated when connected to a smartphone.
  • 1/1000-second stopwatch
    Measuring capacity:
    00’00″000~59’59″999 (for the first 60 minutes)
    1:00’00″0~23:59’59″9 (after 60 minutes)
    Measuring unit:
    1/1000 second (for the first 60 minutes)
    1/10 second (after 60 minutes)
    Measuring modes: Elapsed time, split time
  • Countdown timer
    Measuring unit: 1/10 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 second to 24 hours (1-second increments and 1-hour increments)
  • 5 multi-function alarms (with countdown, daily, 1 time, schedule)
  • Hourly time signal
  • Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents)
  • Battery level indicator
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
  • Regular timekeeping
    Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 1 dial (countdown indicator)
    Digital: Hour, minute, second, pm, month, date, day
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Approx. battery operating time:
    6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Size of case : 62.5×53.8×17.3mm
  • Total weight : 87g

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GR-B100 Comparison Table with similar G-Shock Watches


GR-B100

Price (Amazon)

Year of first Release

2019

2018

Accuracy

Bluetooth (via phone app)

Radio-controlled (via atomic watch signals), Bluetooth (via phone app)

Bluetooth (via phone app)

SmartWatch Features

G-Shock Connected App (simplifies certain watch operations by letting you perform them on your phone screen)

G-Shock Connected App (simplifies certain watch operations by letting you perform them on your phone screen)

G-Shock Connected App (simplifies certain watch operations by letting you perform them on your phone screen)

Light

Neobrite (hands and hour markers) Double LED light

Neobrite (hands and hour markers) and LED light (Super Illuminator)

Neobrite (hands and hour markers) Double LED light

Alarm

5 daily alarms

Daily alarm

5 alarms with date setting, hourly time

Timer

Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-minute increments and 1-hour increments)

Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-second increments)

Measuring unit: 1/10 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments and 1-hour increments)

Stopwatch

1/100-second stopwatch
00'00"00~59'59"99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times

1-second stopwatch
Measuring capacity: 23:59'59
Others: Flyback, direct timing start from the timekeeping mode

1/1000-second stopwatch
Measuring capacity:
00'00"000~59'59"999 (for the first 60 minutes)
1:00'00"0~23:59'59"9 (after 60 minutes)
Measuring unit:
1/1000 second (for the first 60 minutes)
1/10 second (after 60 minutes)
Measuring modes: Elapsed time, split time

Hourly Time Signal

Yes

No

Yes

World Time

38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping

27 time zones, Home city time swapping, auto summer time (DST) switching

39 time zones* (39 cities + coordinated universal time), one-touch UTC time zone, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
*May be updated when connected to a smartphone.

Alpha Gel /
Vibration Resistance

No

Yes

No

Altimeter

Yes

No

No

Auto-Back Light

Yes

No

Yes

Barometer

Yes

No

No

Compass

Yes

No

No

Multi Day Format

No

No

Yes

Multi Language Day

No

No

Yes

Step Tracker

Yes

No

No

Sunrise Sunset

Yes

No

No

Tough MVT

No

Yes

No

Case / bezel material

Carbon (Carbon Core Guard)

Carbon (Monocoque Case)

Resin / Stainless steel

Glass

Mineral (Spherical Glass)

Sapphire Glass with non-reflective coating

Mineral Glass

Battery

2 years on CR2025

Solar Powered (CTL920)

Solar powered (CTL1616)

Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size

63×54.1×18.3

 50.1×46.4×16.9

62.5×53.8×17.3


Full features (if you want to know more)

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GR-B100 Replacement Band (Strap) *availability
We think it is very important (before buying a new watch) to know if there will be some choice as for replacement bands for GR-B100 (in future or even now). So we made a research and you shouldn’t worry about your future as the bands are available for buying.

starting from 60$ on eBay →
starting from 61$ on PacParts →


Recent News about GR-B100 

All Casio GR-B100 News →


You ask, we answer…

What does Full-dot STN display in GR-B100 mean?

A large 7 x 33 dot LCD that enables clear, high-resolution digital display of the alarm and 1/1000-second stopwatch functions.

What does G-SHOCK Connected App in GR-B100 do?

You may manage all watch settings through your phone.

What does Tough Solar in GR-B100 mean?

CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.

What does Flight Log in GR-B100 do?

It records location and time data during the flight. It’s addictive watching the 3D map display in the app.


Not sure about GR-B100? There are more G-Shocks!

Back to All G-Shock Models →

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