opchat vs Byrthday

opchat lets you chat with all major AI models in one place — using your own API keys or running models directly on your device. Your API keys stay on your device, encrypted with secure storage. Your conversations go directly to the AI provider you choose and never pass through our servers. No middleman, no subscriptions, no ads. BRING YOUR OWN KEYS Connect OpenAI (GPT), Anthropic (Claude), Google (Gemini), DeepSeek, OpenRouter, Straico, Azure, Ollama, or any OpenAI-compatible endpoint. Switch between models mid-conversation or set a default per persona. ON-DEVICE MODELS Run AI models directly on your device — completely offline, no API key needed. Browse and download models from Hugging Face. Your data never leaves your phone. Perfect for privacy-sensitive use or when you're offline. YOUR PHONE, YOUR APPS • Calendar — ask what's on your schedule or add events, across every calendar on your phone (Google, Outlook, iCloud) • Reminders & Contacts — add to your lists, look up a number or a birthday • Notion, Google Workspace, Todoist, Linear, Jira & Confluence — connect in a tap • MCP servers — add any tool server by URL • Your own skills — describe an API and the AI builds the connector BUILT-IN TOOLS • Web search and page reading with your own Serper, Tavily or Firecrawl key • Image generation & editing • Memory — the AI remembers what matters across conversations • Reminders and to-do lists • Dictation and read-aloud CUSTOM PERSONAS Create AI assistants tailored to your needs. Set a system prompt, personality, speaking style, knowledge areas, and conversation starters. ORGANIZE YOUR WORK Group conversations into projects. Pin important chats. Search across all your history. Export conversations as Markdown or JSON. FULLY CUSTOMIZABLE Choose from multiple themes or create your own with custom colors. Pick from 23 fonts. Adjust message density, roundness, and font size. FREE AND PRO Free forever: chat with one cloud AI provider of your choice, on-device models, web search, memory, reminders, dictation and one persona. Pro is a one-time purchase — no subscription: all your AI providers at once, Standby and hands-free voice mode, integrations and MCP, your own skills, image generation, unlimited personas, all themes and fonts. PRIVATE BY DESIGN No ads and no data selling. Your API keys are encrypted on-device, and your conversations go straight to your chosen AI provider — we never see them. The app sends anonymous usage statistics and crash reports to help us improve it. Use on-device models or Ollama for fully local AI with no data leaving your phone. AI-GENERATED CONTENT All responses are generated by third-party AI models and may be inaccurate or incomplete. Content safety is enforced by each provider's built-in policies. You can report any AI-generated response directly within the app. Terms of Use: https://opchat.app/terms Privacy Policy: https://opchat.app/privacy

Keep track of birthdays and anniversaries, and find the right words for family, friends and colleagues – no account needed. IMPORTANT DATES, YOUR WAY • Choose a time and how far ahead to be reminded: 30, 14, 7, 3, 2 or 1 day before, and on the day. Add birthdays, wedding anniversaries or your own occasions, such as a name day. • By default: a week before, the day before and on the day. Want a follow-up? Choose every three hours on the day until 9 pm, until you tap “Done”. • Each reminder opens the greeting for that occasion. Milestone birthdays and anniversaries are recognized and highlighted. WORDS THAT SOUND LIKE YOU • Choose from curated greetings by relationship and tone: warm, funny or formal. Templates are free to use, offline and unlimited. • Edit any message, share it on WhatsApp or another app, or copy it. You always tap “Send” yourself. KEEP GIFT IDEAS TOGETHER • Keep gift ideas for each person, mark gifts as given with the year, and add an extra reminder for the gift if you like. • Link people to Christmas Eve/Christmas, St. Nicholas Day, Valentine’s Day, Easter, Mother’s Day or Father’s Day. Get one notification for gifts 30 days before Christmas, or 7 days before other holidays. • Byrthday calculates movable dates for you. AI, ONLY IF YOU WANT IT • Optional: create a personalized AI greeting from a first name, occasion, tone, relationship, age or number of years where relevant, and your own keywords. 5 AI requests are free, for greetings and gift ideas combined; an internet connection is needed. • The app asks for your consent first. For AI texts, these details go to our server and then to OpenAI. • Optional AI gift ideas use the occasion, interests and budget, without a name. YOUR DATA, YOUR CHOICE • No account or sign-up. Occasions and settings are stored on your device. Reminders are local notifications, with no push server. • Contacts import is optional: choose what to bring in. The import happens on your device; no contact data is sent. • Calendar access is optional: import birthdays from your calendars or add occasions to a separate “Byrthday” calendar. Other calendars stay unchanged. • Back up and sync with a file in your own storage, such as iCloud Drive or Google Drive – no Byrthday account needed. • Ask for birthdays or share anniversaries and other occasions via a link. • Usage statistics and crash reports are optional and off by default. PLUS, IF YOU WANT MORE • Byrthday Plus includes up to 30 AI requests a day and at most 300 in 30 days (greetings and gift ideas combined), home and lock screen widgets with a countdown, the Apple Watch app, and no ads. • Plus without AI, one-time purchase: everything in Plus except unlimited AI requests; the 5 free AI texts stay. • Alarm mode with Plus: on the day a real alarm sounds, even in silent or Focus mode, then hourly until 9 pm. Real alarms need iOS 26 on iPhone; otherwise you get a time-sensitive notification. • Choose a monthly subscription, a yearly subscription (with a 7-day free trial) or a one-time purchase. • The free version shows small banners, never between a reminder and a greeting. GOOD TO KNOW • The app is available in German, English, French, Spanish, Italian, Dutch and Japanese; switch in the app. Large text is supported. • Whether and when reminders appear depends on your device’s notification and battery settings. Privacy: byrthday.app/en/privacy · Terms: byrthday.app/en/terms · Imprint: byrthday.app/en/imprint