| What it does | Calendar, Reminders and Notes in your MacBook notch
| Free inventory and profit tracker for resellers who source in person at car boots, charity shops and flea markets
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
| GB
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| Pricing model | Paid
| Free
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| Pricing | $20 once, lifetime license. 7-day free trial, no card required.
| Completely free to download and use. No subscription, no in-app purchases, no ads, no account required. FlipperHelper Pro (web portal, eBay sync, multi-device sync) is in development but pricing has not been finalised.
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| Key features | - Calendar integration with week view
- Reminders with priority flags and categories
- Apple Notes with checklists and tables
- Clipboard history with search and pin
- Focus timer
- Natural-language event and reminder entry
- Stores last 500 clipboard clips
- Full app view with contacts and linked items
- Works without macOS notch on external displays
| - Track items across 16 selling platforms including eBay, Vinted, Facebook Marketplace, Depop, Poshmark and Mercari
- Offline-first functionality with full feature access at markets with no signal
- Automatic profit calculation after all fees and expenses
- Multi-currency support with daily exchange rates
- Photo capture for up to 10 images per item
- One-tap Google Sheets export and ZIP backup
- Money Flow dashboard showing revenue, costs and profit by time period
- Automatic SKU generation using Crockford Base32 encoding
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| What makes it different | - Works with Apple's own Calendar, Reminders and Notes apps without importing
- All data stays on your Mac, never uploaded to a server
- One-time $20 payment with no subscription
- Installs and updates directly via Terminal without App Store sandbox restrictions
- 14-day refund guarantee, no questions asked
| - Built by a solo developer specifically for real in-person reselling, not a funded product designed by a boardroom
- Fully offline operation designed around markets with poor or no signal, not offline as an afterthought
- Real profit calculation that includes all costs from day one, including trip expenses split per item
- 100% free forever with no hidden fees, ads or mandatory account creation
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 6 ▲ +2 (up) since last check | 5 ● no change since last check |
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| Trust Flow (Majestic) | 1 | 3 |
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| Citation Flow (Majestic) | 20 | 23 |
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| Referring domains (Majestic) | 20 | 22 |
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Cupola