Casio GA-800vsCasio GBA-400
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

GA-800

GBA-400
Diameter
48.6mm
51.9mm
Lug-to-Lug
54.1mm
lowest
55mm
Thickness
15.5mm
lowest
18.3mm
Water Resistance
200m
200m
MSRP
$99
lowest
$200
Movement
Quartz
Module 5413
Case
6 specsCrystal & Dial
4 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Casio GA-800 is widely praised for its legible analog dial, dual LED illumination, and precise second hand, with many owners appreciating its comfortable size and thinness compared to other G-Shocks. Reviewers and owners consistently highlight its value and well-thought-out ana-digi design, with some calling it the best G-Shock at its price point. However, some users wish for lumed hour markers, a more robust world time function, and lament the lack of solar and atomic capabilities. One owner reported unexpected resets after a battery change, and a stopwatch record storing function glitch affected some units. Accuracy is reported as around +7 seconds per month. Overall, owners rate the Casio GA-800 highly for its legibility and comfortable wearability at the price.
Owners report the Casio GBA-400 is a rugged, 200m water-resistant Bluetooth watch that allows remote music control from a smartphone. The watch has demonstrated remarkable durability, with one owner noting it looked brand new after five years of use and various tortures. However, connectivity issues are noted, with one owner unable to connect to an iPhone and another reporting the app does not work with Android 12, while Bluetooth connectivity can be inconsistent and music controls may not work with all phones. Some owners also flag the crown as fragile, with one reporting it broke and required repair. Overall, owners rate the Casio GBA-400 highly for its durability and ruggedness, despite noted Bluetooth connectivity and crown fragility concerns.
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