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Coming soon: modular Android watches and phones

Oct 16, 2015 — by Eric Brown 1,288 views

Modular Android smartwatches and smartphones are around the corner, as evidenced by new devices coming soon from Blocks and Fairphone.

Blocks, which has been developing a modular, open source smartwatch for several years, has re-emerged with a resoundingly successful Kickstarter campaign, and a new Android Lollipop based operating system. UK-based Blocks has already hauled in more than $700,000 for its Blocks smartwatch, and packages starting at $195 are still available through Nov. 19, with shipments due in May 2016.

When Blocks was first announced a year ago, it ran Tizen on an Atom-based Intel Edison module. (Blocks was a top-10 finalist out of 400 entries in an Intel Make It Wearable challenge.) The company then switched to Android Wear, and when that proved too limiting, created its own Android 5.0 based OS and UI stack. The OS runs on Qualcomm’s dual-core, 1.2GHz Snapdragon 400 processor, the standard platform for Android Wear.

Blocks comes in three colors
(click image to enlarge)

Blocks’s unique, modular approach to smartwatch technology remains the same. The device starts with a base level watch, which you can augment with add-ons built into individual chain links of the wrist band. You can then hot-swap these using plug connectors. One limitation of the design is that the number of modules one can wear ranges only from three to five, depending on the size of your wrist, although to be fair, it’s hard to imagine being able to cram more modular options into a watch-piece itself.

Snapping the Blocks modular watch together
(click image to enlarge)

The company was inspired by UK-based Phonebloks, which also inspired, and has since been aligned with Google’s Project Ara. Like these modular smartphone projects, which also include the open source Fairphone 2 (see below), the Blocks watch is billed as being “future proof. The idea is that you can continue to improve its capabilities without having to buy a new watch and dispose of the old one. In other words, it’s good for your pocketbook and for the environment, too.


With the hot-swap capability, you can customize the watch on the fly depending on your planned activities. In the latest iteration, you can choose up to five chain-link modules, or none at all. Not surprisingly, most backers opted for the $250 or $260 packages, since sold out, which ship with four modules of your choice. The same kit is still available in $275 and $285 packages, plus $30 for the fifth module. The initial set of modules include an extra battery, heart rate sensor, GPS, NFC, or an adventure module with altitude, pressure, and temperature sensors.

Blocks building blocks
(click image to enlarge)

Planned for next year are a SIM card module with GSM, letting you send and receive text messages or reply to emails using voice. Also in the works for 2016 are fingerprint and LED add-ons, as well as a programmable button module that “can be used as an emergency (SOS) alert for the elderly, for taking cheeky selfies, or controlling your music,” says Blocks.

Eventually, Blocks plans to add air quality, camera, flash memory, and stress-monitoring (galvanic skin sensor) modules. Beyond that, the company is considering making the watch screen itself modular, with different sizes, shapes, and display types available. Currently, only the color of the watch-piece is customizable.

Blocks core, inside and out
(click images to enlarge)

The base watch-piece has a round-faced, 1.35-inch color display with 360 x 360 pixels. Like most Android Wear watches, Blocks provides 512MB RAM, 4GB of eMMC flash, Bluetooth 4.1 BLE, a microphone, and accelerometer, gyro, and vibration functions. Like most, it’s also IP67 certified for resistance against water, with plans for fully waterproof IP68. The battery is said to last 1.5 days, extendable via the extra battery module.

A Blocks module, inside and out
(click images to enlarge)

Unlike most Android Wear models, it also offers WiFi, enabling more autonomy away from a connected smartphone. A smartphone app will be available for Android and iOS, letting users receive selected notifications, as well as download customized watch faces and apps.

According to a June TechCrunch report, Blocks decided against Android Wear due to its lack of support for iOS phones, as well as its overall limitations, especially in its support for cellular. Android Wear has since added iOS support, but it offers a fairly limited subset of features.

A year ago, when Blocks was a Tizen project, the company said it would make both the hardware and software components open source. Now, however, it says only that it’s an “open platform.” The company has already signed up 1,500 developers who are waiting to receive the SDK and Module Development Kit (MDK).

Much of the delay in getting Blocks off the ground came from difficulties finding a manufacturer. Compal is now on board, however, and much of the Blocks technical team has moved to Taiwan to work closely with the OEM firm.

Blocks is challenged by the fact that it’s tough for a small startup to deliver a wide selection of modules from the start. Blocks’s solution is to have the modules developed and sold by a variety of partners using its open platform. The partners will be able to sell modules and apps at a planned BlockStore, where customers can also trade old modules with other users.

Assuming the company can quickly ramp up with additional modules before a wider retail launch in 2016, Blocks has a chance in the still unformed smartwatch industry. One big challenge, in addition to the limitations on the number of modules that can be worn at once, is that there is no way to upgrade the processor without buying another $195 watch. However, if their plans for a modular screen go through, that would make the mainboard modular as well, reducing the cost.

Blocks’s chain-link design mitigates the technical integration issues of modular interconnects in a monolithic form-factor such as a phone. In many ways, wearables, being a fashion accessory, are a better fit for modular technology, with more demand for customization.

Fairphone 2 beats Project Ara to market

While Project Ara is being redesigned to fix its magnetic connection technology, another modular smartphone called the Fairphone 2 is available for 529 Euros on pre-order, with shipments due in November. The new version adds modularity, with snap-in modules including the mainboard, display, microphone, rear and front cameras, and a 2420mAh battery.

Fairphone 2, back, front, and inside out
(click image to enlarge)

The modular design makes it easier to replace and repair components, leading to a longer product lifespan, says Amsterdam-based Fairphone. In particular, being able to quickly replace the screen at a reasonable price has considerable appeal.

The dual-SIM, LTE-ready Fairphone 2 has advanced to a faster, quad-core Snapdragon 801 with 2GB of RAM, 32GB storage, and a 5-inch, HD display. The phone offers both 8- and 2-megapixel cameras, as well as the typical array of wireless and sensor features.

Like the original Fairphone, the Fairphone 2 is based on Android and is fully open source in hardware and software. It’s also claimed to follow exceptional standards for environmental and social impact.

This article is copyright © 2015 and was originally published here. It has been reproduced by with the permission of its owner. Please visit for up-to-date news and articles about Linux and open source.

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One response to “Coming soon: modular Android watches and phones”

  1. Max says:

    So, just how much modularity is it going to take before I can have a proper, full, slide-out hardware QWERTY keyboard on a modern Android phone again…?

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