How is the quality of Casio?
Reviewers report mixed feelings about Casio’s quality, with a slight majority expressing positive sentiment, 893 positive mentions compared to 716 negative ones. Overall, the trend shows a gradual improvement in customer perception, particularly from late 2025 through mid-2026, as average ratings climbed from 3.07 stars in September 2025 to a high of 3.66 stars in April 2026. Many customers praise the durability and reliability of Casio watches themselves, especially models like the G-Shock line, noting consistent timekeeping and rugged build. However, a significant number of complaints center on the companion app and its functionality, particularly around Bluetooth syncing, app stability, and missing features. While some users appreciate the app’s simplicity and design, others find it unreliable, poorly updated, or even misleading in its data handling. The balance of feedback suggests that while the physical product quality remains strong, the digital experience has become a growing point of frustration for many users.
What customers praise
Customers frequently praise the physical build and long-term reliability of Casio watches. Many highlight that the time remains accurate over years of use, and the watches withstand daily wear, water exposure, and drops. Users often mention that Casio’s durability sets them apart from other brands, with several noting they’ve owned multiple Casio watches over the years without needing repairs. The simplicity and ease of use of the watch’s interface are also frequently cited as strengths.
What customers said:
- „It's nice to know that the time is accurate“
- „works so well ya don't even have to touch the watch“
- „This works perfectly with my new GW-BX5600.“
Common complaints
Common complaints focus on the Casio app’s performance and reliability. Users report frequent disconnections between the watch and phone, leading to lost settings and incorrect time displays. Some believe the app is intentionally designed to force reconnection by letting time drift when Bluetooth is off. Others criticize the app for poor functionality, such as the 'Find My Phone' feature having a very short range and failing to work consistently. Several users also report that key features like the O2 sensor and nightly recharge do not work as advertised.
What customers said:
- „I HATE it when my watch if off time because I turned my bluetooth off“
- „The GPRH1000 O2 sensor, Nightly Recharge option & solar charger on the watch DO NOT…“
„The GPRH1000 O2 sensor, Nightly Recharge option & solar charger on the watch DO NOT FUNCTION!“
- „the app is so weak and of no use“
How it has changed over time
The quality of the Casio app has declined over time, according to user feedback. Early versions were praised for having detailed model databases and full functionality, but recent updates have removed these features, replacing them with a less useful social tool. The app’s redesign has led to confusion, with users losing access to critical information and functions. Some reviewers note that the app now feels outdated and underdeveloped, especially after the discontinuation of the G-Shock Connected app, which left many watches without proper support.
What customers said:
- „after the gshock connected app was discontinued“
- „The previous app had a full database of all watches and models, all are now gone.“
- „I constantly have "NO DATA" that appears on the watch“
Practical takeaways
For users considering a Casio watch, the physical product remains a strong choice for durability and accuracy. However, the app experience is a major factor to weigh. If you rely on features like automatic time sync, activity tracking, or location sharing, be prepared for potential issues. It’s advisable to check recent reviews for the specific model and app compatibility before purchasing. Some users recommend using the watch without the app if possible, as the core timekeeping and physical features are still highly rated.
What customers said:
- „I like syncing my watch for correct time adjustments“
- „the time walking off sync is intentional to force you to reconnect to their app“
- „Great dependable watch!!“
Over time
Data as table
| Month | Avg. rating | Count |
|---|---|---|
| 2025-09 | 3.07 | 45 |
| 2025-10 | 2.86 | 36 |
| 2025-11 | 3.20 | 40 |
| 2025-12 | 3.43 | 90 |
| 2026-01 | 3.59 | 100 |
| 2026-02 | 3.50 | 125 |
| 2026-03 | 3.55 | 119 |
| 2026-04 | 3.66 | 108 |
| 2026-05 | 3.46 | 126 |
| 2026-06 | 3.41 | 140 |
| 2026-07 | 3.41 | 139 |
| 2026-08 | 3.64 | 66 |
Sentiment over time
Data as table
| Month | Positive | Neutral | Negative | Count |
|---|---|---|---|---|
| 2025-09 | 42% | 9% | 49% | 45 |
| 2025-10 | 36% | 6% | 58% | 36 |
| 2025-11 | 43% | 10% | 48% | 40 |
| 2025-12 | 49% | 12% | 39% | 90 |
| 2026-01 | 59% | 5% | 36% | 100 |
| 2026-02 | 48% | 10% | 42% | 125 |
| 2026-03 | 57% | 8% | 35% | 119 |
| 2026-04 | 57% | 3% | 40% | 108 |
| 2026-05 | 57% | 6% | 37% | 126 |
| 2026-06 | 50% | 6% | 44% | 140 |
| 2026-07 | 53% | 8% | 40% | 139 |
| 2026-08 | 59% | 6% | 35% | 66 |
Customer voices
Short excerpts - full reviews are available at the original source.
„when i lose connection between watch and phone, I lose all settings“
„the watch should save the settings“
„the connection, layout of watch settings for Bluetooth connected ones are so simple to use“
„as usual Casio operating at a different league“
„It works great to set up everything on your watch.“
„the app tracks steps and makes it fun to watch your progress“
„This app is selling your location data.“
„My GA B2100 would not sync time in background“
What Reddit users discuss
Below are extracts from Reddit which discuss quality in more detail - each linked to the original thread.
„Has a countdown timer with autorepeat, 5 multi-function alarms, 24 hour stopwatch (as opposed the 1 hour), dual time, 10 year battery, larger digits, better backlight and easier to use buttons“
Cite this page
Citatio (2026). Casio Quality: customer reviews 2026. Retrieved 19 August 2026 from https://citatio.ai/casio-reviews/quality/
Data verifiable via our public audit log: Methodology · Transparency