Air-gapped Bitcoin cold storage on feature phones. Zero cost. Plausible deniability. Your keys, your control.
mempool
Joined December 2025
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Cryobrick retweeted
Standard hardware wallets scream "I hold Bitcoin".
So we built @cryobrick, an open-source, air-gapped Bitcoin wallet disguised as a $20 feature phone.
Our Substack article covers why we built CryoBrick. Link 👇
open.substack.com/pub/apalok…
Cryobrick retweeted
Full version with better formatting is on Substack 👇
open.substack.com/pub/apalok…
Would love to hear your thoughts in the comments there.
Is MicroStrategy accelerating Bitcoin adoption or diluting its essence?
#Bitcoin #MicroStrategy #SelfCustody
Cryobrick retweeted
Man, it’s easy to get black-pilled seeing all this dystopian stuff like VPN bans for age verification and the broader push toward digital IDs, social credit systems, and CBDCs.
But seeing people all around the world tinkering to make Bitcoin better freedom money makes me bullish!
Cryobrick es un proyecto de cold storage Bitcoin airgapped que corre en feature phones basicos, esos celulares de teclado fisico que cuestan pocos dolares, el concepto es simple, el celular queda completamente desconectado de internet y funciona como hardware wallet de bajo costo, el app se llama Compass y permite crear y restaurar carteras Bitcoin sin ninguna conexion de red, costo de hardware cero, plausible deniability porque parece cualquier otra app, your keys your control, proyecto nuevo creado en diciembre de 2025, vale la pena seguirlo en cryobrick.com 🧡⚡️
Cryobrick retweeted
Cryobrick introduces an air-gapped Bitcoin cold storage solution that runs on basic feature phones.
The phone remains completely disconnected from the internet and functions as a low-cost hardware wallet.
Using the “Compass” app, users can create and restore wallets fully offline.
No internet, near-zero cost, and strong plausible deniability.
Cryobrick retweeted
🚨 JIO PHONE BECOMES A BITCOIN VAULT!
Cryobrick — an innovation by Indian developers that could replace hardware wallets.
✦ WHAT IS CRYOBRICK?
↳ Air-gapped cold storage for basic feature phones!
↳ Fully offline — no internet, no hacking
↳ Stealth mode — hidden like a normal app
↳ Made in India by local developers
✦ WHY IT’S SPECIAL?
↳ Low cost: Ledger/$150+, Trezor/$200 vs Jio Phone ₹699
↳ Full custody with 12-word seed phrase
↳ Open source — transparent, no backdoors
✦ INDIA ANGLE
↳ 500M+ basic phone users can now carry a cold wallet in their pocket — no banks, no high costs
Trezor $200. Ledger $150. Jio Phone ₹699. Game over for expensive hardware wallets?
Cryobrick retweeted
Hello everyone, thanks for showing your love and support for CryoBrick. We really appreciate it.
Order CryoBrick 👇
cryobrick.com/
Our GitHub 👇
github.com/cryobrick
Cryobrick retweeted
hey so JTAG does gets you the localStorage dump for sure, but even though your get that, the wallet mnemonic is encrypted with AES-256-GCM behind a mandatory 12+ char passwd (letters, num, and symbols). So after your 15 mins you've got an encrypted blob and a brute force prblem🙃
Cryobrick retweeted
Your old Nokia 3310 can now become a Bitcoin wallet.
This open source wallet, Cryobrick, can be hidden on basic cellphones like any normal app, giving you private and offline custody.
Play Snake and HODL on same device.
- @RunwithBitcoin
Cryobrick retweeted
So cool! Free Open Source Software undefeated.
Cryobrick es un proyecto de cold storage Bitcoin airgapped que corre en feature phones basicos, esos celulares de teclado fisico que cuestan pocos dolares, el concepto es simple, el celular queda completamente desconectado de internet y funciona como hardware wallet de bajo costo, el app se llama Compass y permite crear y restaurar carteras Bitcoin sin ninguna conexion de red, costo de hardware cero, plausible deniability porque parece cualquier otra app, your keys your control, proyecto nuevo creado en diciembre de 2025, vale la pena seguirlo en cryobrick.com 🧡⚡️
Cryobrick retweeted
Open-source bitcoin wallet in India that can be hidden on old cellphones as any app.
Cryobrick retweeted
This new open-source bitcoin wallet called ‘Cryobrick’, invented by a team of developers in India, can be hidden on old cellphones and disguised as any app.
Cryobrick retweeted
Your old feature phone is now a Bitcoin wallet.📱🧱
Breaking down the architecture for Cryobrick:
Air-gapped Bitcoin cold storage built natively for feature phones.
Sovereign, offline security without the premium price tag. This is how we onboard the Global South. Let's build! 🏔️🛡️
Cryobrick retweeted
It’s a pleasure to introduce the teams for the Student of Bitcoin Accelerator.
These teams were picked because they’re working on real problems in the Indian and global Bitcoin landscape.
The goal: give builders and tinkerers the structure to figure out if their idea is a pet project or has the potential to become a sustainable business.
We have 12 weeks to find out!
Success here isn’t about raising money. It’s about clarity on what comes next.
Cryobrick retweeted
Great vibes at our Mumbai meetup! 🙌
Over 20 developers joined us in Mumbai🚀
🎤 @OP_Ataraxia shared insights on Bitcoin ecosystem startups & opportunities in India
📱 @apalok21 demoed @cryobrick — air‑gapped Bitcoin cold storage on a feature phone
🧠 Shared updates on Bitshala cohorts, clubs, and other activities
🤝 Fostered valuable connections and collaborations
🔗 Stay connected — follow us for more updates and upcoming meetups!
Bitcoin for Developers | Mumbai | Sunday, 11th Jan 2026 | 11:00 AM - 1:00 PM
📅 Sunday, 11th January 2026
🕐 11:00 AM - 1:00 PM
📍 Khar West, Mumbai, India
If you are in Mumbai, come join us to discuss about:
i) A Bitcoin Core fork that has mempool space integrated by @OP_Ataraxia
ii) Demo of Cryobrick: Air-gapped Bitcoin cold storage on your feature phone by its developers @apalok21 and @Anipy1
Cryobrick retweeted
Bitcoin for Developers | Mumbai | Sunday, 11th Jan 2026 | 11:00 AM - 1:00 PM
📅 Sunday, 11th January 2026
🕐 11:00 AM - 1:00 PM
📍 Khar West, Mumbai, India
If you are in Mumbai, come join us to discuss about:
i) A Bitcoin Core fork that has mempool space integrated by @OP_Ataraxia
ii) Demo of Cryobrick: Air-gapped Bitcoin cold storage on your feature phone by its developers @apalok21 and @Anipy1
Cryobrick retweeted
Bitcoin products from India are just getting started!
bitasha.com/ and now @cryobrick
Super exciting to see these 2 indigenous opensource products - @cryobrick hardware wallet and @bitaxeindia hobby miner - emerging from the 2 @Bitplebs_in summits we co-organised in Goa last year!
India’s builder ecosystem is just getting started ✨
Cryobrick retweeted
Super exciting to see these 2 indigenous opensource products - @cryobrick hardware wallet and @bitaxeindia hobby miner - emerging from the 2 @Bitplebs_in summits we co-organised in Goa last year!
India’s builder ecosystem is just getting started ✨