GRCatalog vs ReminderOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GRCatalog
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This application is a data capture program which works on a wide range of technologies, including barcode scanning, RFID scanning, signature capturing, fingerprint scanning, contactless card reading, etc. User selects the appropriate data capture tool in the program and uses it with the data capture equipments developed by Grabba.
ReminderOS
Create highly customizable reminders with flexible repeat schedules and instant notification actions. Sync across devices without accounts, prioritizing user privacy. Designed for busy individuals and those with ADHD to manage tasks and routines effectively.
- Customizable recurring reminders
- Snooze and reschedule from notifications
- Seamless iCloud sync across devices
- Privacy-first design, no tracking
- Built for busy and ADHD minds
- Flexible scheduling options
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ReminderOS - Reminders that keep up with you. Create simple reminders or ultra-specific repeat schedules with ReminderOS. Sync seamlessly across your devices, snooze or reschedule from notifications, and stay on top of deadlines, habits and routines - all while keeping your data private. No clutter. No tracking. Just reminders that work. Recurring reminders, your way ReminderOS gives you full control over how reminders repeat. Set flexible schedules like: • Every 3 days • Every 2 weeks • Specific weekdays • Custom recurring intervals If you can describe it, ReminderOS can schedule it. Snooze without opening the app Handle reminders instantly from your notifications. • Snooze reminders • Reschedule tasks • Mark reminders as complete Stay focused without switching apps. Sync across your devices Your reminders stay updated across all your devices using iCloud. • No accounts required • No tracking • Your data stays yours Privacy-first by design. Built for busy and ADHD minds ReminderOS helps reduce overwhelm with clean design, flexible scheduling and persistent reminders that actually stick. Use ReminderOS for: • Work deadlines • Medication reminders • Study schedules • Habits and routines • Daily life admin Simple when you need it. Powerful when it matters. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is in-app purchases: GRCatalog at none against ReminderOS's 3. GRCatalog also leads on iOS requirement (12.0 vs 26.2). ReminderOS's advantage is update cadence (every 4 days vs every 2 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ReminderOS sells 3 in-app purchases, starting at $2.99 per 7 days. GRCatalog asks for nothing beyond the download.
GRCatalog ships an update every 2 months, ReminderOS every 4 days. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.
| Parameter | GRCatalog | ReminderOS |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 7 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Grabba International Pty Ltd | Paul Waweru |
In-app purchases
GRCatalog
No in-app purchases
ReminderOS
- ReminderOS Pro1 Month trial$2.997 Days
- ReminderOS Pro1 Month trial$39.991 Year
- ReminderOS Lifetime$49.99









