{"product_id":"private-diary-app-twin","title":"Twin — Private Diary App with On-Device AI by BJ Beyond","description":"\u003cp\u003e\u003cstrong\u003eTwin is a private diary app with on-device AI.\u003c\/strong\u003e You can write or record your day, track mood, sleep and expenses, and ask questions about your own memories. Everything stays encrypted in your browser. There is no account, no cloud journal and no subscription. You pay once and activate with one code.\u003c\/p\u003e\n\u003ch2\u003eWhat you get\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLifetime access to the Twin web app (version 2.0) with a personal \u003cstrong\u003eTWIN1\u003c\/strong\u003e activation code\u003c\/li\u003e\n\u003cli\u003eThe complete 20-page English user guide (PDF)\u003c\/li\u003e\n\u003cli\u003eWorks in modern browsers on iPhone, Android and computer. You can install it to the Home Screen. No App Store needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInstant download after purchase: you'll find your files on the order confirmation page and in your email.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eFeatures of this private diary app\u003c\/h2\u003e\n\u003ch3\u003eWrite or record your day\u003c\/h3\u003e\n\u003cp\u003eWrite text entries or voice notes, then add date, mood, sleep and expenses. You can also set a monthly budget and three personal goals.\u003c\/p\u003e\n\u003ch3\u003eLocal AI that stays on your device\u003c\/h3\u003e\n\u003cp\u003eOptional text AI (Llama\/Qwen-class models) and Whisper voice transcription run in your browser after a one-time public model download. Your entries are never sent to an AI server. Local AI can make mistakes.\u003c\/p\u003e\n\u003ch3\u003ePatterns, memories and letters\u003c\/h3\u003e\n\u003cp\u003eAsk questions about your past entries, look at patterns and scenarios, and write letters to your future self. Answers cite your own notes.\u003c\/p\u003e\n\u003ch3\u003eEncrypted by design\u003c\/h3\u003e\n\u003cp\u003eYour journal and voice recordings are stored in an AES-256-GCM encrypted vault in your own browser. Encrypted backups use PBKDF2-SHA256 with 600,000 iterations and can be restored at any time.\u003c\/p\u003e\n\u003ch2\u003eDevice compatibility and AI downloads\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eDevice or feature\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eRequirements and limits\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eiPhone \/ iPad\u003c\/th\u003e\n\u003ctd\u003eUse an up-to-date Safari and Add to Home Screen. The diary works without AI. Twin selects a lighter local AI mode on iPhone\/iPad; full models may exceed the device’s available memory.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eAndroid\u003c\/th\u003e\n\u003ctd\u003eUse an up-to-date browser. Local AI uses WebGPU when available, or a slower CPU mode. Support depends on the phone, browser and available memory.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWindows \/ Mac \/ Linux\u003c\/th\u003e\n\u003ctd\u003eUse an up-to-date browser. A compatible WebGPU GPU enables the GPU model; CPU mode is available and is slower.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eVoice notes\u003c\/th\u003e\n\u003ctd\u003eMicrophone permission is required. Recording and optional local transcription are separate features; transcription downloads an additional speech model.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp\u003e\u003cstrong\u003eDownload and storage:\u003c\/strong\u003e the lightweight iPhone AI is about 365 MB; the full CPU model is about 512 MB and the GPU model about 1 GB. These estimates exclude additional runtimes, semantic-memory and speech-model files. Keep at least 1 GB free for lightweight mode and allow more space for other models, recordings and backups. Wi-Fi is recommended.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore relying on AI:\u003c\/strong\u003e available memory, browser storage and device performance affect model loading. A supported browser does not guarantee that every model will run. Lightweight answers can be simpler, especially outside English. You can keep using the diary without enabling AI.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOffline use and backups:\u003c\/strong\u003e internet is required for the first app load and each model’s initial download. Offline use depends on keeping the downloaded files in the same browser. Clearing browser data can remove your journal and model files; keep an encrypted backup. Public hosting and model servers receive normal download requests, not your diary entries.\u003c\/p\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eBuy Twin. Your personal TWIN1 activation code is delivered with your order.\u003c\/li\u003e\n\u003cli\u003eOpen bjbeyond81.github.io\/apps\/twin\/ and paste the code. It is checked offline on your device.\u003c\/li\u003e\n\u003cli\u003eCreate your profile, then save your first memory and an encrypted backup.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003ePrivacy\u003c\/h2\u003e\n\u003cp\u003eThis private diary app has no account, no tracking of your content, and no cloud copy. The device lock is your access boundary. Keep the code and your backups private. There is no cloud recovery.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eIs it a subscription?\u003c\/h3\u003e\u003cp\u003eNo. It is a one-time purchase.\u003c\/p\u003e\n\u003ch3\u003eDo I need internet?\u003c\/h3\u003e\u003cp\u003eYou need it to load the app and download the optional AI models the first time. After that, the diary and the downloaded AI work offline.\u003c\/p\u003e\n\u003ch3\u003eCan I use it on several devices?\u003c\/h3\u003e\u003cp\u003eActivation is per browser. Each browser or device is a separate local space. To move your journal, use an encrypted backup.\u003c\/p\u003e\n\u003ch3\u003eWhat if I lose my code?\u003c\/h3\u003e\u003cp\u003eKeep a private copy. You can also show it in Settings → Show activation code. Contact us with your order number if you need help.\u003c\/p\u003e\n\u003ch3\u003eIs Twin a medical or therapy tool?\u003c\/h3\u003e\u003cp\u003eNo. Twin is a personal journaling tool. It is not a medical device and does not give medical, psychological or financial advice. In an emergency, call 112.\u003c\/p\u003e\n\u003cp\u003eMore about Quiete and this private diary app on the official BJ Beyond page: \u003ca href=\"https:\/\/bjbeyond.it\/human-edge-apps\/\"\u003ebjbeyond.it\/human-edge-apps\u003c\/a\u003e.\u003c\/p\u003e","brand":"BJ Beyond","offers":[{"title":"Default Title","offer_id":61444088627534,"sku":"TWIN-APP-V2","price":29.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1079\/7871\/9566\/files\/twin-en-gate.png?v=1793305085","url":"https:\/\/bjbeyond.studio\/products\/private-diary-app-twin","provider":"Bj Beyond ","version":"1.0","type":"link"}