All three are excellent AI assistants. The difference is in memory, platform integration, and control over your data.
| Feature | ChatGPT | Gemini | Thremark |
|---|---|---|---|
| Visible, editable memory (marks) | — | — | |
| Transparent — see everything AI remembers | — | — | |
| Real-time voice with memory | Limited | — | |
| Smart Routing (auto-pick best model) | — | — | |
| Native iPhone app (SwiftUI) | — | — | |
| Siri & Shortcuts | — | — | |
| Widgets & Dynamic Island | — | — | |
| Share Extension | — | — | |
| Image generation | |||
| Web search in chat | |||
| File analysis | |||
| Structured files (plans, lists, trackers) | — | — | |
| Multiple AI providers in one app | — | — | |
| Cross-device sync | |||
| Free tier | |||
| Free web app | |||
| Data not used for training | Opt-out | Opt-out |
ChatGPT and Gemini save memory behind the scenes — you see hints, not facts. Thremark shows every mark: searchable, editable, deletable. You always know what your AI knows.
Pure SwiftUI with 30 Apple integrations: Siri, Dynamic Island, widgets, Share Extension, HealthKit, Spotlight. Not a WebView. Not Electron. Built for iPhone.
Smart Routing picks GPT, Gemini, or Claude for each message based on your vibe (Fast / Smart / Creative). One app, multiple providers, no manual switching.