ContextFlow vs Trayzero
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ContextFlow
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ContextFlow is a Safari extension that adds an AI-powered sidebar to every webpage. Select text or load the full page โ then ask questions and get instant, context-aware answers. HOW IT WORKS 1. Install ContextFlow and enable the Safari extension 2. Open any webpage and tap the ContextFlow icon 3. Ask a question โ the AI reads the page and gives you a precise answer FEATURES - Works on any website โ articles, documentation, research papers, emails - Select specific text or use the full page as context - Streaming AI responses in real time - Dark mode support - Adjustable font size - Share AI responses to any app with a website as a source PLANS - Free: 5 trial requests to try it out - BYOK ($1.99/mo): Unlimited access with your own OpenAI API key - Pro ($6.99/mo): Everything included, no API key needed Your subscription works across Safari on iPad, Mac and iPhone. Manage or cancel anytime in Settings โ Subscriptions. PRIVACY - Your data is never stored on our servers - Page content is sent to OpenAI only when you ask a question - API keys are stored locally on your device - No tracking, no ads Terms of Use https://aisidebar.netlify.app/terms
Trayzero
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Trayzero brings David Allen's Getting Things Done (GTD) method to your iPhone. Free, no ads, no account, no sign-up. Your data lives on your device. Always. THE FIVE GTD STEPS, BUILT IN Capture - one tap, anywhere. A floating Capture button on every screen. Share anything from any app straight into your inbox. Voice-to-text for hands-free thoughts. A Home Screen widget for the fastest possible "add to inbox." Clarify - the killer flow. Process Inbox runs you through your captures one at a time, card-stack style. Each card walks the full GTD decision tree: actionable? Two-minute rule? Delegate? Single step or a project? When? Where? You hit inbox-zero faster than you thought possible. Organize - the canonical GTD lists. Inbox, Next Actions, Projects, Waiting For, Someday/Maybe, Calendar, Reference. Plus a real Project type with outcome, next-action warning, and Active / On Hold / Someday / Done / Dropped status. Seven default @-contexts you can extend (@phone, @computer, @errands, @home, @office, @anywhere, @waiting). Areas of Responsibility for the higher altitudes. Reflect - a Weekly Review wizard. A seven-step Friday review walks you through the canonical GTD pass: clear inbox, review next actions, check waiting-for, scan calendar, review someday/maybe, look at projects, set next week's intentions. Daily review supported too. Engage - do now. The Engage tab filters Next Actions by Context, Energy (low / medium / high), and Time Available (under 5m / 15m / 30m / 1h). Pull up the actions that match the moment you're in. REMINDERS THAT ACTUALLY WORK Due-date, defer-until, waiting-for follow-up, and weekly-review nudges fire as system notifications with action buttons - Done, Snooze, Move to Next Actions. Calendar two-way sync mirrors dated items into your system calendar. VOICE, PHOTOS, AUDIO Capture by voice. Attach photos or voice memos to any item. PRIVACY YOU DON'T HAVE TO THINK ABOUT - 100% on-device. SQLite under the hood. - No account, no servers, no analytics. - Crash reporting is opt-in and off by default. - Backup/restore as plain JSON: you own your data, you can take it anywhere. WHO IT'S FOR - GTD practitioners who want a clean, focused app that respects the method. - Anyone tired of cloud-syncing personal task data through someone else's servers. - People who want their tasks where their phone is - and nowhere else. Trayzero is an independent app inspired by the Getting Things Done methodology. It is not affiliated with, endorsed by, or sponsored by David Allen Company. "Getting Things Done" and "GTD" are trademarks of the David Allen Company. Terms of Use (EULA): https://trayzero.app/terms Privacy Policy: https://trayzero.app/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: Trayzero at 13.0 against ContextFlow's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. ContextFlow sells 2 in-app purchases, starting at $1.99 per month and Trayzero sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
ContextFlow ships an update every 6 weeks, Trayzero monthly. The most recent releases landed on September 28, 2026 and September 30, 2026 respectively.
| Parameter | ContextFlow | Trayzero |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Monthly โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 16.6 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 4 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Aliaksandr Liubchanka | Feipeng Liu |
In-app purchases
ContextFlow
- BYOK Subscription$1.991 Month
- Pro Subscription$6.991 Month
Trayzero
- Supporter (Monthly)$0.991 Month
- Supporter (Yearly)$7.991 Year
- Small Tip$1.99
- Large Tip$9.99









