I unfolded the Razer Prio for the first time expecting the same compromise every mobile controller makes: full-size comfort or pocket-sized portability, never both. Closed, it’s roughly the footprint of a credit card with a central rotation disk locking the halves together. Snapped open to its full length, it reveals full console-style controls: a tactile 4-way D-pad, silent face buttons, dual bumpers, analog triggers, and capacitive thumb sticks.
The Prio is Razer’s answer to the backpack-sized mobile controller problem. It folds down into a pocketable block, plugs directly into USB-C for latency-free gaming without battery management, and stretches to accommodate phones up to 7 inches with cases up to .59 inches thick, including large handsets like the iPhone 17 Pro Max and Galaxy S26 Ultra. At $99.99, though, it lands at the exact same price as Razer’s bulkier Kishi V2, which is something to consider.
Every mobile controller so far has made you choose
Full controls or a pocketable size
Mobile gaming hardware has to manage a dance between ergonomics and portability. On one end of the spectrum are full-sized mobile gamepads like the Razer Kishi V3 Pro, which prioritizes deep console-style grips, full-travel analog triggers, and full-sized thumb sticks. They deliver a genuine console-quality experience, but their rigid bridges and bulky form factors make them awkward to transport, taking up significant space in a backpack or requiring dedicated carrying cases.
The obvious alternative (and the default for millions of mobile gamers) is relying entirely on native on-screen touch controls. They cost nothing and require zero extra hardware, making them immediately accessible. However, as we all know, touch controls remain a compromise as well. Virtual D-pads offer no physical feedback, screen-swipe aiming lacks precise control, and covering critical display real estate with your thumbs ruins game visibility.
Until now, hardware makers attempting to bridge this gap with pocketable controllers have usually stripped away fundamental inputs, swapping full analog triggers for shallow digital buttons, shrinking thumb sticks down to frustrating nubs, or abandoning standard layouts altogether. The engineering challenge isn’t just making a controller smaller; it’s shrinking the hardware down to an everyday-carry footprint without ruining the actual input mechanics required to play full console and PC ports. Other solutions are just super tiny and hard to use with adult-sized hands.
The Prio folds two halves together to get to credit-card size
How the folding design and pocket footprint work
The Razer Prio achieves its much smaller footprint via an interlocking two-half design joined by a central rotation disk and a flexible band of rubber. Instead of sliding straight out on a rigid bridge, you twist and swivel the halves outward from the center to deploy the grips. The unfolding mechanism is tricky to wrap your head around at first, but ultimately it makes sense. The band is attached to a circular device that clicks as it rotates, so you have to be a bit assertive with it. Once opened, though, it’s an easy thing to slot the USB-C port into your smartphone and stretch the other side up and over the top of your phone.
When collapsed down, the Prio measures 4.21 x 2.64 x 1.26 inches and weighs 3.57 ounces. While its 1.26-inch thickness makes it chunkier than an actual credit card, its height and width mirror a credit-card footprint that easily slides into a front jeans pocket, jacket, or small cross body bag, bypassing the need for a larger carrying case that you’d use for full-sized mobile gamepads. Once unfolded around a phone, the frame extends to an open length of roughly 8.54 inches, adding about 1.69 inches of physical controller to each side of your screen.
The Prio doesn’t scrimp on button layout
It’s got full controls, contactless sticks, and a built-in launcher
Despite its pocketable size, the Prio packs a full input set: four face buttons, two analog triggers, two bumpers, two clickable thumb sticks , and four function buttons. Razer uses capacitive, contactless sensors for the sticks specifically to prevent analog drift over time. Face buttons are also engineered to be silent, eliminating the loud clickiness common to other mobile gamepads. Because it connects directly over USB-C, there is no internal battery to keep charged and zero Bluetooth pairing hassle; it simply draws power straight from your phone. That’s a tradeoff, though, as there’s no pass-through charging here. A Razer representative told me that the decision to leave it off came from the use case of the Prio — quick gaming sessions on the go.
For software, a dedicated controller button launches Razer’s companion app (Cortex Mobile), which sets supported platforms like Xbox Cloud Gaming, GeForce NOW, Steam Link, and PS Remote Play right alongside your native games. The app even includes advanced dead zone and polling rate adjustments, providing surprisingly granular control for a $100 mobile accessory.
The compromises worth knowing before you buy one
Trigger feel, case gaps, and foldable limitations
While the Prio packs a full layout into a card-sized footprint, it isn’t without hardware trade-offs. The analog triggers feel a little squishy and don’t feature the crisp tactile response you might find on a full-sized controller, making the L2/R2 inputs the one spot where the design feels like a concession to size.
Razer’s spec sheet advertises support for phone cases up to 15mm thick, but your mileage may vary based on the case size you use. I tend to keep my iPhone 15 Pro Max caseless, but i could see a larger case being an issue. There are extra izing bumpers in the box, too, to help with the fit.
When I tried to connect it via USB to my Galaxy Z Fold 8, it didn’t wrap around the phone at all, due to the passport ratio of the foldable phone. It also didn’t instantly just work, as it did with my iPhone; there may be a setting to toggle; more research is needed.
Is the world’s smallest full controller worth buying at $99.99?
It will be up to you and the type of gaming you do on your phone, but for me, the compact size and ease of use makes the Razer Prio a fantastic value. It’s got all the buttons and responsiveness I need for a variety of games, including Dead Cells, Warframe, and OceanHorn 3 without being a massive chunk I need to bring a bigger bag for. Using it on the bus or airplane becomes super easy, then, as it unfolds and connects without any fuss. I do wish it had passthrough charging for longer flights, but the tradeoff in size and convenience makes it a worthwhile purchase.