With The Heir, Ganance is launching an unusual wearable on the market that transforms classic wristwatches into smart companions. Instead of buying a new smartwatch, the small module is simply attached to the back of existing watches – whether they are inexpensive models from Casio or luxury watches from Rolex. The approach combines analog style with digital functions and thus meets a current trend in the wearable market.
- Ultra-compact gadget (3 mm thin, 5 g light) for retrofitting existing watches
- Vibration notifications for calls and messages
- Activity tracking with synchronization to Apple Health and Google Health
- Tool-free attachment without adhesive thanks to micro-suction structure
The Heir in detail: smartwatch functions for any analog watch
The concept behind The Heir is as simple as it is clever: a small disk is placed on the back of an existing wristwatch and adds smart functions to it. With a diameter of around 30 millimetres and a weight of just five grams, the gadget is hardly noticeable in everyday life. It is attached without adhesive – instead, a special structure of fine air channels ensures that the module is securely attached and can be removed again without leaving any residue.
Functionally, The Heir focuses on two central areas. Firstly, an integrated vibration motor informs you of incoming calls or messages on the connected smartphone. This preserves the classic look of the watch, while important notifications still arrive directly on the wrist.
The gadget also offers basic fitness tracking functions. Movement sensors record steps, distance covered, active times and calories burned. The collected data can be synchronized with common platforms such as Apple Health or Google Health, allowing it to be seamlessly integrated into existing health ecosystems.
However, The Heir deliberately dispenses with advanced sensor technology such as heart rate measurement. This omission seems plausible, as the design has been kept extremely compact and the product is designed as a supplement rather than a full-fledged smartwatch replacement. The battery life of around 42 hours is also within the typical range for small wearables, but requires regular charging.
Between style and function: new possibilities for wearables
The Heir’s approach shows how the wearable market is evolving. While classic smartwatches often stand out due to their technical design, this gadget deliberately focuses on understatement. Existing watches – whether sporty, minimalist or luxurious – remain visually unchanged and are merely functionally enhanced.
This creates an interesting alternative, especially for users who do not want to choose between classic watch design and modern technology. At the same time, the barrier to entry remains low, as no completely new hardware needs to be purchased. Instead, an existing accessory is upgraded.

There are also practical advantages in everyday life: The reduced feature set ensures simple operation without complex menus or displays. At the same time, it covers the most important smartwatch functions that are actually relevant in everyday use. Limitations such as the lack of a display or advanced health functions are deliberately accepted in order to keep size and weight to a minimum.
Conclusion
The Heir offers an exciting approach to smartly enhance analog watches without changing their design. The concept seems well thought out and realistic, even if compromises have to be made in terms of battery life and sensor technology. The gadget can be pre-ordered now for around 149 US dollars (approx. 129 euros), with delivery planned for spring 2026. Shipping to Germany is possible.