HomeCasio Classic Watches Get Modern Upgrades: Bluetooth, Step Tracking & Games
The legendary Casio F-91W digital watch, unchanged since its 1989 debut, is finally receiving modern smart features - though surprisingly not from Casio itself. Enter the Ollee Watch One: an innovative replacement motherboard compatible with Casio's F-91W, A158W, and several other classic models. This plug-and-play upgrade requires no soldering skills - just basic screwdriver proficiency to access the watch's internals. While it won't transform your retro timepiece into an Apple Watch rival, it adds Bluetooth connectivity, automatic time synchronization, step tracking, retro gaming capabilities, and customizable colored backlighting.
The do-it-yourself upgrade kit, priced at $54.99, fits six popular Casio models including the F-84W, A159W, A171W, and W-59. Installation reportedly takes just six minutes according to the manufacturer. For those preferring a turnkey solution, Ollee offers pre-modified F-91W-1 and A158W-1 watches at $99.99, though current stock remains unavailable.
This smart enhancement brings several notable improvements:
- Built-in accelerometer enabling step counting functionality
- Enhanced audible alerts via upgraded buzzer
- Integrated temperature sensor
- Customizable multicolor LED illumination doubling as flashlight
- World time functionality
- Programmable timer presets
*The Ollee Watch One upgrade includes a simple ball-bouncing game called* Ping. Image: OlleeThe upgrade maintains the F-91W's classic segmented LCD display - no notification support or screen enhancements here. However, owners can enjoy retro-style entertainment including a Blackjack variant and the paddle game Ping. Battery performance understandably decreases from Casio's seven-year claim to approximately ten months using Bluetooth Low Energy technology with a standard CR2016 battery.
Related article
Clawdmeter transforms Claude Code usage data into a compact desktop dashboard
The tokenmaxxing trend in Silicon Valley now has its own physical device. A new open source project converts your Claude Code usage statistics into a compact desktop dashboard, enabling AI power users to monitor their consumption at a glance.Of cours
Generalist Unveils GEN-1 General-Purpose AI Model for Physical Systems
To develop GEN-1, Generalist enhanced training stability, created custom kernels, devised novel paged attention methods for real-time inference, refined post-training techniques, and improved controls for smoother, more precise operation. | Source: G
Duolingo Faces New Competition as Google Integrates Language Learning into Translate
Google is introducing AI-driven language learning tools directly into its Translate application. This new beta feature personalizes language lessons to match your proficiency and specific goals, like preparing for an international trip.Initially, the
Related Special Topic Recommendations
Education and Learning
AI Study Tools for Homework and Exam Prep
2026 Latest Best AI Study Tools for Homework and Exam Prep! XIX.AI curates a top-rated list of powerful, game-changing tools that help students boost productivity, streamline homework completion, and ace exams through real-world tests. Get a free vs paid comparison, detailed rankings, and must-try options to unlock your AI edge. Explore now!
10 tools
xix.ai
Music composition
AI Vocal Demo Tools for Songwriters, Hooks, Toplines, and Multilingual Draft Sessions
2026 Latest Best AI Vocal Demo Tools for Songwriters, Hook Creators, and Multi-Language Content Teams! XIX.AI has curated a top-rated list of powerful game-changing tools that go through rigorous real-world tests. You’ll find detailed free vs paid comparison data, comprehensive rankings, and must-try options to help you boost writing efficiency and unlock your creative potential. Explore now to discover your perfect tool for all your content needs!
9 tools
xix.ai
Business
Best AI Competitive Research Tools for Small Businesses
2026 Latest Best Top-rated AI Competitive Research Tools for Small Businesses! XIX.AI has curated a highly powerful game-changing collection, updated weekly with rigorous real-world tests and detailed rankings. You can find a comprehensive free vs paid comparison to help you identify the must-try tools that boost your productivity and give you a competitive edge. Explore now to discover your perfect tool!
9 tools
xix.ai
Image editing
Photoshop AI Retouch Tools for Ecommerce Apparel, Skin Cleanup, and Color Consistency
2026 Latest Best Photoshop AI retouch tools for ecommerce apparel, skin cleanup, and color consistency! This top-rated curated list features powerful game-changing solutions that help you boost writing efficiency, streamline content creation, and achieve perfect visual results effortlessly. Each tool has undergone real-world tests through weekly updated rankings, complete with free vs paid comparison details. Backed by XIX.AI, it’s the must-try guide for anyone aiming to unlock your AI edge. Explore now!
10 tools
xix.ai
Prompt
Best AI Prompt Libraries for ChatGPT Workflows
2026 Latest Best Top-Rated AI Prompt Libraries for optimizing all types of ChatGPT workflows. XIX.AI has curated a powerful, game-changing collection that goes through rigorous real-world tests to ensure top performance. You can find detailed free vs paid comparisons and expert rankings to help you choose the must-try tools that boost your productivity and unlock your AI edge. Explore now!
11 tools
xix.ai
Education and Learning
AI Quiz Builder Platforms for Teachers, Tutors, and Cohort-Based Learning Programs
2026 Latest Best AI Quiz Builder Platforms for Teachers, Tutors, and Cohort-Based Learning Programs! XIX.AI has curated a top-rated list of powerful game-changing tools that go through real-world tests to deliver accurate rankings. These must-try platforms help boost writing efficiency, streamline content creation, and simplify quiz design across all learning scenarios. Explore now to discover your perfect tool for unlocking your AI edge in teaching!
13 tools
xix.ai
Comments (2)
0/500
![StevenMartínez]()
Ça c'est vraiment cool ! Une communauté qui réinvente un classique que Casio n'a même pas modernisé 🤣. J'adore le côté "hack" open-source qui garde le look rétro mais ajoute pleins de fonctionnalités utiles. Par contre, je ne sais pas si ça tiendra toute la journée en bluetooth activé... 😅 Mais bravo aux ingénieurs derrière ce projet ! C'est plus qu'une montre, c'est un symbole !
![JoseLewis]()
Haha, the ultimate stealth upgrade! Making a retro icon secretly smart via a PCB swap is such a hacker mindset. It's way cooler than Casio's own smartwatches—feels like giving a vintage car an electric drivetrain. Wonder if Casio will see this as flattery or a legal threat?
The legendary Casio F-91W digital watch, unchanged since its 1989 debut, is finally receiving modern smart features - though surprisingly not from Casio itself. Enter the Ollee Watch One: an innovative replacement motherboard compatible with Casio's F-91W, A158W, and several other classic models. This plug-and-play upgrade requires no soldering skills - just basic screwdriver proficiency to access the watch's internals. While it won't transform your retro timepiece into an Apple Watch rival, it adds Bluetooth connectivity, automatic time synchronization, step tracking, retro gaming capabilities, and customizable colored backlighting.
The do-it-yourself upgrade kit, priced at $54.99, fits six popular Casio models including the F-84W, A159W, A171W, and W-59. Installation reportedly takes just six minutes according to the manufacturer. For those preferring a turnkey solution, Ollee offers pre-modified F-91W-1 and A158W-1 watches at $99.99, though current stock remains unavailable.
This smart enhancement brings several notable improvements:
- Built-in accelerometer enabling step counting functionality
- Enhanced audible alerts via upgraded buzzer
- Integrated temperature sensor
- Customizable multicolor LED illumination doubling as flashlight
- World time functionality
- Programmable timer presets
The upgrade maintains the F-91W's classic segmented LCD display - no notification support or screen enhancements here. However, owners can enjoy retro-style entertainment including a Blackjack variant and the paddle game Ping. Battery performance understandably decreases from Casio's seven-year claim to approximately ten months using Bluetooth Low Energy technology with a standard CR2016 battery.
Clawdmeter transforms Claude Code usage data into a compact desktop dashboard
The tokenmaxxing trend in Silicon Valley now has its own physical device. A new open source project converts your Claude Code usage statistics into a compact desktop dashboard, enabling AI power users to monitor their consumption at a glance.Of cours
Generalist Unveils GEN-1 General-Purpose AI Model for Physical Systems
To develop GEN-1, Generalist enhanced training stability, created custom kernels, devised novel paged attention methods for real-time inference, refined post-training techniques, and improved controls for smoother, more precise operation. | Source: G
Duolingo Faces New Competition as Google Integrates Language Learning into Translate
Google is introducing AI-driven language learning tools directly into its Translate application. This new beta feature personalizes language lessons to match your proficiency and specific goals, like preparing for an international trip.Initially, the
2026 Latest Best AI Study Tools for Homework and Exam Prep! XIX.AI curates a top-rated list of powerful, game-changing tools that help students boost productivity, streamline homework completion, and ace exams through real-world tests. Get a free vs paid comparison, detailed rankings, and must-try options to unlock your AI edge. Explore now!
10 tools
xix.ai
2026 Latest Best AI Vocal Demo Tools for Songwriters, Hook Creators, and Multi-Language Content Teams! XIX.AI has curated a top-rated list of powerful game-changing tools that go through rigorous real-world tests. You’ll find detailed free vs paid comparison data, comprehensive rankings, and must-try options to help you boost writing efficiency and unlock your creative potential. Explore now to discover your perfect tool for all your content needs!
9 tools
xix.ai
2026 Latest Best Top-rated AI Competitive Research Tools for Small Businesses! XIX.AI has curated a highly powerful game-changing collection, updated weekly with rigorous real-world tests and detailed rankings. You can find a comprehensive free vs paid comparison to help you identify the must-try tools that boost your productivity and give you a competitive edge. Explore now to discover your perfect tool!
9 tools
xix.ai
2026 Latest Best Photoshop AI retouch tools for ecommerce apparel, skin cleanup, and color consistency! This top-rated curated list features powerful game-changing solutions that help you boost writing efficiency, streamline content creation, and achieve perfect visual results effortlessly. Each tool has undergone real-world tests through weekly updated rankings, complete with free vs paid comparison details. Backed by XIX.AI, it’s the must-try guide for anyone aiming to unlock your AI edge. Explore now!
10 tools
xix.ai
2026 Latest Best Top-Rated AI Prompt Libraries for optimizing all types of ChatGPT workflows. XIX.AI has curated a powerful, game-changing collection that goes through rigorous real-world tests to ensure top performance. You can find detailed free vs paid comparisons and expert rankings to help you choose the must-try tools that boost your productivity and unlock your AI edge. Explore now!
11 tools
xix.ai
2026 Latest Best AI Quiz Builder Platforms for Teachers, Tutors, and Cohort-Based Learning Programs! XIX.AI has curated a top-rated list of powerful game-changing tools that go through real-world tests to deliver accurate rankings. These must-try platforms help boost writing efficiency, streamline content creation, and simplify quiz design across all learning scenarios. Explore now to discover your perfect tool for unlocking your AI edge in teaching!
13 tools
xix.ai
Ça c'est vraiment cool ! Une communauté qui réinvente un classique que Casio n'a même pas modernisé 🤣. J'adore le côté "hack" open-source qui garde le look rétro mais ajoute pleins de fonctionnalités utiles. Par contre, je ne sais pas si ça tiendra toute la journée en bluetooth activé... 😅 Mais bravo aux ingénieurs derrière ce projet ! C'est plus qu'une montre, c'est un symbole !
Haha, the ultimate stealth upgrade! Making a retro icon secretly smart via a PCB swap is such a hacker mindset. It's way cooler than Casio's own smartwatches—feels like giving a vintage car an electric drivetrain. Wonder if Casio will see this as flattery or a legal threat?
