Una Modular GPS Watch Review: A Repairable Design That's a Promising First Step

Looking at the Una GPS Watch Through the Lens of Repairability

At a time when smartwearables are trending toward high integration and near-impossible disassembly, one GPS watch — the Una watch — is charting a different course with its focus on modularity and repairability. Products like this address a persistent pain point in consumer electronics: when one component fails, users are typically forced to replace the entire device, driving up costs and contributing to growing mountains of e-waste.

Una's core selling point is its "modular" and "repairable" design. In theory, users can swap out the battery, screen, or other key components themselves without discarding the entire watch. For GPS sports watches — devices used heavily and prone to noticeable battery degradation — this design philosophy has genuine practical value.

A note on sources: the original material available for this article is extremely limited, consisting only of a review headline from Hacker News — "Una watch review: A modular, repairable GPS watch is a good first step" — with no body text or technical details to draw from. The analysis below is based on the product's positioning and broader industry context.

Why Modular Design Matters

Repairability has become a shared focus for both the tech industry and regulators in recent years. Regions like the EU have been pushing "Right to Repair" legislation, requiring manufacturers to design more serviceable products and maintain parts availability.

For GPS watches specifically, a modular design delivers value in at least three ways:

Extending Device Lifespan

The battery is typically the first component to degrade in a sports watch. A user-replaceable battery design can significantly extend a device's useful life, preventing a worn-out battery from forcing a full replacement.

Lowering Long-Term Costs

Replacing a single damaged module almost always costs far less than buying a brand-new watch — a particularly meaningful advantage for heavy athletic users.

Reducing E-Waste

Longer product lifespans directly translate to less electronic waste, aligning with the growing sustainable consumption movement.

The Right to Repair movement has a concrete backdrop worth noting. In 2021, the Biden administration signed an executive order pushing Right to Repair legislation in the US. The EU followed in 2024 with the formal passage of the Right to Repair Directive, requiring manufacturers to supply spare parts for at least 10 years after a product is discontinued and prohibiting the use of software to block third-party repairs. This regulatory wave initially targeted home appliances and smartphones, but is increasingly extending to wearables. Mainstream watch products from Apple, Garmin, and others routinely rely on adhesive seals and proprietary screws — iFixit has long given the Apple Watch a repairability score of just 1 out of 10. Against that backdrop, Una's modular stance carries sharp differentiation value.

What "A Good First Step" Really Means

The phrase "a good first step" in the review headline is telling. It suggests Una has moved in the right direction with its modular concept, but may not yet represent a fully mature product.

First-generation modular devices commonly face challenges including: modular structures that may compromise water resistance and overall thinness; questions about whether core experiences like GPS accuracy, battery life, and software ecosystems can compete with established players; and uncertainty about whether long-term module and parts availability will hold up — because that's what makes a "repairable" promise credible.

In other words, modularity and repairability are genuine advantages, but a GPS watch must first pass muster on the fundamentals before it can truly win the market.

The tension between modular design and water resistance is one of the most fundamental engineering challenges here. Mainstream GPS sports watches typically achieve 5ATM (50-meter) or even 10ATM water resistance ratings, relying on precisely engineered monolithic seals. Once you introduce the seams of detachable modules, the durability of gaskets and the consistency of user-reassembled seals become real vulnerabilities. The modular watch space has a cautionary tale: the Blocks Watch, launched in 2016, ultimately failed to ship at scale due to issues with water resistance, battery life, and supply chain management — a classic crowdfunding failure. Whether Una can find a reliable balance between repairability and waterproof durability will be a key technical indicator of whether it can move beyond "concept product" status.

Implications for the Wearables Industry

Una's attempt reflects a potential shift in the wearables market: as feature differentiation becomes increasingly difficult, "sustainability" and "repairability" may emerge as new competitive dimensions. As more users start caring about the environmental impact and long-term cost of their devices, products willing to challenge the closed, monolithic design paradigm may win a loyal core of values-driven customers.

That said, whether ideals-first products can scale remains to be seen. A modular business model places higher demands on supply chains, parts management, and user education. Whether Una can turn "a good first step" into a sustainable path forward is worth watching closely.

Closing Thoughts

The Una modular GPS watch represents an exploration worth encouraging in the wearables space. At a moment when the Right to Repair movement and sustainable consumption are gaining real traction, its existence carries symbolic weight. However, given the limited information currently available, key performance metrics — battery life, GPS accuracy, and real-world durability — still await more complete third-party testing data. Interested readers would do well to follow detailed independent reviews before making a purchase decision.