KIISU - Compact Flipper alternative

<h2>MEET KIISU</h2> <p>The Flipper Zero is an <i>open-source project</i>, KIISU is a credit-card sized Flipper Zero compatible device. Everything you can do on a Flipper: NFC, RFID, SubGHz, Infrared, Bluetooth, iButton - you can do on KIISU.</p> <p>There's even bunch of extra sensors - temperature, light, air-pressure, accelerometer &amp; compass you can use! <br> Flipper Zero firmware: original and alternative run directly on the KIISU without any modification or fiddling about.</p> <p>Built to be more developer-friendly and hackable, it's also compact, budget-friendly and wallet sized!</p> <div class="grid" style="margin-top: 2em;"> <div class="grid-item small--one-whole medium--one-whole large--one-third text-left"> <h3>CREDIT CARD-SIZED &amp; CUTE</h3> <p>Incredibly compact - the power of Flipper crammed into credit-card format. Slips into your wallet: ready for every moment.</p> </div> <div class="grid-item small--one-whole medium--one-whole large--one-third text-left"> <h3>100% COMPATIBLE</h3> <p>Built on the Flipper Zero's Open-Source schematics - KIISU is completely compatible: hardware, firmware, functionality.</p> </div> <div class="grid-item small--one-whole medium--one-whole large--one-third text-left"> <h3>BUDGET &amp; DEV FRIENDLY</h3> <p>If you're a tinkerer at heart, you'll love KIISU's open nature. If you're looking for a budget-friendly alternative KIISU is for you.</p> </div> </div> <!-- main Atropos container (required), add your custom class here --> <div class="atropos my-atropos atropos-forced-size"> <!-- scale container (required) --> <div class="atropos-scale"> <!-- rotate container (required) --> <div class="atropos-rotate"> <!-- inner container (required) --> <div class="atropos-inner"> <!-- put your custom content here --> <img src="https://cdn.shopify.com/s/files/1/2175/8571/files/PCB-Zoom.png?v=1769774796"> </div> </div> </div> </div> <div style="margin-top: 1em;"> <h2>THE ORIGIN STORY</h2> <p>KIISU is the first fully-compatible device built from Flipper Zero's open-source schematics. Originally built as a proof-of-concept, KIISU scratches an itch for multiple people: it's budget-friendly, its naked PCB format is easier to hack and develop on, it's got a bunch of extra sensors - and its form factor means you can always have a Flipper in your pocket.</p> </div> <style> .feature-item { margin-bottom: 1.5em } </style> <div class="grid" style="margin-top: 3em;"> <div class="grid-item small--one-whole medium--one-whole large--one-half text-left product-image-container"> <img alt="" src="https://cdn.shopify.com/s/files/1/2175/8571/files/KIISU---Perspective---Taller.jpg?v=1769775161" style="margin-bottom: -2em"> <ul class="markers-list"> <li data-y="24" data-x="18" data-feature-id="1" class="feature-marker">1</li> <li data-y="16" data-x="50" data-feature-id="2" class="feature-marker">2</li> <li data-y="35" data-x="90" data-feature-id="3" class="feature-marker">3</li> <li data-y="52" data-x="57" data-feature-id="4" class="feature-marker">4</li> </ul> </div> <div class="grid-item small--one-whole medium--one-half large--one-half text-left" style="text-align: start;"> <div data-feature-id="1" class="feature-item"> <h3>1. DREAM SCREEN</h3> KIISU's screen is an identical resolution OLED for beautiful crisp black and white pixels. </div> <div data-feature-id="2" class="feature-item"> <h3>2. FLIPPER, BUT FLATTER</h3> All hardware, firmware (original and alternative) and software (desktop, cli and mobile apps) are completely compatible with the original Flipper. </div> <div data-feature-id="3" class="feature-item"> <h3>3. BATTERIES INCLUDED</h3> Rechargeable LIR2032 batteries give KIISU juice on the go - it really is a Flipper for your wallet! </div> <div data-feature-id="4" class="feature-item"> <h3>4. ONBOARD EVERYTHING</h3> The perfectly tuned SubHZ, BLE, NFC and RFID antennas are embedded into the PCB - along with extra sensors like accelerometers, a compass, light and pressure! </div> </div> </div> <p>Quirky and cute, compact and wallet-friendly, there are many reasons to be seduced by KIISU. There's an active community building all sorts of extensions, a forked-firmware and even 3D printable accessories. All that's needed is your participation - and KIISU!</p> <div style="margin-top: 2em;" class="grid"> <div class="grid-item small--one-whole medium--one-half large--one-half text-left"> <h2><strong>What's included</strong></h2> <ul> <li>KIISU (v4b)</li> <li>1x LIR-2032 Rechargeable Battery</li> <li>1x Quickstart Guide</li> <li>1x KIISU Mascot Keychain</li> </ul> </div> <div class="grid-item small--one-whole medium--one-half large--one-half text-left"> <h2><strong>What's included</strong></h2> <ul> <li><a href="https://raw.githubusercontent.com/kiisu-io/kiisu4/refs/heads/main/kiisu%20v4b%20manual%20and%20quick%20start.pdf" target="_blank">KIISU Manual + Quickstart Guide</a></li> <li><a href="https://github.com/kiisu-io/kiisu42x%20non-fused%20GPIO%20Replacement%20boards" target="_blank">KIISU Github Repo</a></li> <li><a href="https://discord.gg/kiisu" target="_blank">KIISU Discord Community</a></li> <li><a href="https://makerworld.com/en/models/1821178-kiisu-v4b-official-shield-variations#profileId-1943956" target="_blank">3D Printable KIISU Case models</a></li> </ul> </div> </div> <div class="contentGroup"> <h2>Frequently Asked Questions</h2> <p><b>What are the functional differences between the KIISU and Flipper?</b></p> <p> Although this board can run almost any Flipper Zero firmware, there are a few limitations: </p> <ul> <li>It lacks Flipper Zero secret keys, so some SubGhz rolling-code protocols and U2F may not work with official firmware.</li> <li>Antennas performance may vary.</li> <li>Certain schematic differences mean features like battery status rely on Aux MCU firmware.</li> </ul> <p><b>I flashed Flipper Firmware onto the KIISU, and see "No Factory Keys Found. Secure enclosure is damaged. Some apps will not work".</b></p> <p> Because the KIISU hardware is not produced by Flipper Labs - it doesn't have their factory keys - so the Flipper Firmware shows this notification. The "no factory keys damaged enclave" only impacts functions where Official Flipper keys are required: some SubGHZ rolling codes, and the U2F functionality. In stock KIISU firmware that notification is hidden - this notification only appears when running official Flipper firmware.</p> </div>