Silo vs NETTRASH.Exchange

Silo runs AI models like Gemma 4, Phi-4, and Mistral directly on your iPhone. No servers. No subscriptions. No internet connection. Your conversations never exist anywhere but your device. Actually Private, Not "Cloud Private" Most AI apps encrypt your data before sending it to their servers. Silo never sends it at all. Zero network requests. There is no server to breach. No account required. No login. No data collection. Anonymous by design. Works Without Internet Airplane mode, off-grid, no Wi-Fi. Silo works everywhere because everything runs on your hardware. No connection means no data leaks. Ever. Chat on a plane, in the subway, or anywhere you want absolute privacy. No Subscription. No Limits. No $20/month plans. No lifetime unlock fees. No usage limits. No accounts. No paywalls. Download and use every feature immediately. Open-Source Silo's complete source code is public on GitHub. Don't take our word for privacy. Read the code and verify it yourself. No trust required. Built by an independent developer, not a corporation. Run Popular AI Models On-Device Run the latest open-source LLMs locally with full Metal GPU acceleration. Gemma 4, Phi-4, Mistral, and more running on your iPhone with no cloud required: - Google Gemma 4 E2B. The newest architecture from Google, available in Q4 and Q8 quantizations. Run Gemma 4 entirely on-device. - Microsoft Phi-4 Mini. Top-performing small model, beats Llama 3.2 on every benchmark. Runs on 4 GB RAM. Phi-4 is the best model for its size. - Mistral / Ministral 3B. Instruct and Reasoning variants from Mistral AI. - Liquid AI LFM 2.5. Ultra-efficient 1.2B models with thinking mode. - SmolLM3 3B. Compact, multilingual, 6-language support from HuggingFace. - Meta Llama 3.2. Fast 1B and 3B models from Meta. - Plus Dolphin uncensored, Phi-4, and more community models. Download the models you want and switch between them. Q4 quantizations for every device, Q8 for devices with more memory. Bring Your Own Models from Hugging Face Import any GGUF model from Hugging Face directly in the app. Paste a Hugging Face URL and download. Run Phi, Dolphin, StarCoder, TinyLlama, or any GGUF-compatible model from the Hugging Face model hub. Your models, your choice. Uncensored Models Silo does not filter, censor, or restrict model output. Use uncensored or custom fine-tuned models with zero guardrails imposed by the app. The model answers. We don't interfere. Run Dolphin uncensored, unfiltered Llama, or any model you choose. Chat History & Conversations Save, browse, and manage multiple conversations. Pick up where you left off. Delete conversations you no longer need. All conversation history stored locally on your device. Nothing is ever uploaded. Streaming Markdown Rendering Responses render with proper formatting as they stream. Bold, italic, headers, code blocks, numbered lists, and nested bullets. No raw markdown syntax cluttering your chat. Fast on Apple Silicon Built with llama.cpp and optimized with Metal GPU acceleration and BF16 compute on supported hardware. Responses stream in real time with zero server latency. Tuned for iPhone performance. Gemma 4, Phi-4, Mistral, and Llama all run smoothly on recent iPhones. Model Management Browse recommended models including Gemma 4, Phi-4, Mistral, Llama, SmolLM3, and LFM. Download with progress tracking and manage your model library. See model sizes before downloading. Cancel downloads anytime. Corrupt file detection keeps your library clean. Your AI assistant should answer to you, not to a cloud provider.

Exchange is a cryptographic messenger that puts you in charge of your keys. Type your message in Exchange, encrypt it to a recipient whose public key you have saved, and you get a single line of encrypted text — an EXC2 envelope. Send it through any app you already use: iMessage, Mail, Telegram, WhatsApp, anything that can carry text. The recipient opens it back in Exchange and reads the original message. Nobody else can. Or use the built-in iMessage extension. Tap Exchange in the iMessage app drawer, pick a contact, type, encrypt, send. A locked-message bubble drops into the conversation. The recipient taps it and Exchange opens straight to the decrypted plaintext — no copy-paste, no app switching. NEW IN 1.1 Native Mac support. Exchange now runs as a Mac Catalyst app on Apple silicon and Intel Macs, sharing the same recipient list and decrypt flow as the iPhone version. Decrypt on tap from Messages. Tap a locked-message bubble in iMessage on iPhone or Mac and Exchange opens directly to the plaintext via Universal Links — no copy-paste. Rich link previews. Encrypted messages sent from the Compose flow now appear as preview bubbles in iMessage, Telegram, Slack, and other messengers, with the Exchange icon and an "Install Exchange" page for recipients without the app. Identity sync. By default, your private key is carried across the devices signed into your Apple ID via iCloud Keychain — which is itself end-to-end encrypted with a device-class secret. Toggle off in Settings if you prefer the original device-only behaviour. Recipients sync. Your saved recipient list is also kept in sync across your devices, encrypted on-device with a key derived from your identity. Apple sees only opaque ciphertext — display names, public keys, and notes stay end-to-end encrypted between your devices. Backup and transfer. In Settings, export your identity as a passphrase-encrypted blob you can save in a password manager, or transfer it in person to another of your devices via a single-use QR code. EVERYTHING ON YOUR DEVICE Exchange has no servers. No backend, no accounts, no telemetry, no analytics, no tracking. The cryptographic operations all run locally using Apple's CryptoKit framework. The only data that ever leaves your device is what you explicitly choose to send — and even then, only the encrypted envelope. PROVEN ALGORITHMS Exchange uses standard, publicly-vetted cryptography: - Curve25519 (X25519) key agreement - Ed25519 signatures for sender authentication - ChaCha20-Poly1305 authenticated encryption - HKDF-SHA256 for key derivation - PBKDF2-HMAC-SHA256 for passphrase backup Every message is signed by your identity and verified by the recipient before the plaintext is shown. Tampered envelopes are rejected, not silently corrupted. KEY EXCHANGE THAT MAKES SENSE Two people meet in person — at the office, at a cafe, at a conference. One taps "Show QR code" in Exchange, the other taps "Scan QR" from Add Recipient. A few seconds and they've exchanged the public-key bundle, including a fingerprint they can verify out loud. From then on, no matter what messenger they use to talk, only they can read what they send. WHAT EXCHANGE IS NOT Exchange isn't a chat app. It doesn't have group chats, voice calls, or read receipts. It's a tool you use with whatever transport you prefer. It isn't a key recovery service. If you lose all your devices and don't have iCloud Keychain sync turned on, your identity is gone. There is no developer-side recovery, no master key, no back door. It isn't a server-trust system. There's no central directory of users. You decide who your contacts are, in person or through whatever channel you trust. REQUIREMENTS iOS 26 or later on iPhone and iPad. macOS 26 or later on Mac (Apple silicon or Intel) via Mac Catalyst. Camera optional, used for QR-code scanning. FREE AND OPEN Exchange is independent software that respects your time and your data. No ads, no subscriptions, no upsells.