How Alarm Crypto works under the hood

Alarm Crypto is built and maintained by Lucas Cardoso, the project's founder. The app is run as an independent product — no outside investors — and the code for the backend, the Android app and this website is written and operated by the author.

• X / Twitter — @lucasscardo
• GitHub — lucaskardoso70-ux
• suporte@alarmcrypto.app

Prices come straight from the exchanges, not from aggregators. We work with the official APIs of the six supported venues:

• Binance, Coinbase, Kraken, Bybit, Bitget and MEXC — for spot tokens.
• Bitcoin Ordinals — floor prices are pulled from specialized Bitcoin-NFT data providers, with redundancy to ensure availability.
• Fear & Greed Index — sourced from Alternative.me.
• Altcoin Season Index — computed internally from the 90-day relative performance of the top 50 altcoins versus Bitcoin.

Each source is monitored independently. If one becomes unavailable, the app keeps working with the others.

Put simply: the backend tracks the price of every token in real time, compares it against the triggers you set up, and the moment a price crosses your target, sends a push notification to your phone. The native alarm sound plays even with the app closed and even in "Do Not Disturb" mode.

The architecture is built to scale: the system handles tens of thousands of active alarms without losing latency, with redundancy layers so that isolated failures on an exchange or on the notification network don't block delivery.

• Trigger detection — sub-second from the moment the exchange publishes a new price.
• Notification on the phone — typically 1 to 2 seconds on healthy connections.
• Resilience — redundant verification mechanisms ensure the alarm fires even if the notification network is delayed.

• Not a buy or sell order. An alarm only notifies you. All execution is manual, in your exchange or wallet.
• Not financial advice. The app is a monitoring tool, not a recommendation engine. Investment decisions are the user's responsibility.
• No contracted SLA. The backend has high uptime in practice, but there is no formal response-time guarantee. Tiny delays are possible during extremely fast moves.
• Coverage — only tokens listed on at least one of the supported exchanges. DEX-only tokens are not covered.
• Android permissions — the app depends on active notifications and disabled battery optimization. On some manufacturers (Xiaomi, Realme, Oppo) you also need to allow autostart.

• The app collects only your email (for login) and the alarms you create. No KYC, no phone number, no access to contacts, photos or location.
• Data is stored on our own server, with encryption in transit.
• We don't sell data to third parties. We don't show ads. The business model is a Premium subscription (with a 7-day free trial).
• You can delete your account at any time — all alarms and associated data are removed.
• Formal details are in the Privacy Policy.