Solid Calendar vs Secure Planner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solid Calendar
This app helps you manage your time, tasks, and events with a natural language interface. It acts as a digital planner, rotating schedule manager, and reminder system, syncing with your existing device calendars for seamless organization.
- Add events with natural language input
- Calendar planner with intuitive interface
- Digital planner for tasks and to-do lists
- Rotating schedule management
- Quick join for video calls
- Reminders and smart notifications
- Multiple layout options
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No subscriptions - Buy once, keep forever on all devices Elevate your productivity and organization with Solid Calendar – the all-in-one solution for managing your time, tasks, and events seamlessly. Whether you're a busy professional, a student juggling classes, or anyone looking to make the most of every day, this app offers the perfect blend of a calendar planner, rotating schedule manager, digital organizer and reminders manager. Are you ready to reclaim your time and enjoy a more organized lifestyle? Download this calendar app now and manage your schedule, tasks, and events with ease. Key Features of Solid Calendar: - Add events with natural language Isn't it so much easier when our devices understand us? You can say things like: "Pick up the kids tomorrow at 18:00" "Lunch this Saturday between 12:00 and 14:00" "Meet with Bill in 2 hours" - Calendar planner Stay on top of your schedule effortlessly with this intuitive calendar interface. Plan events, set reminders, and never miss appointments again. With a user-friendly design, adding and managing events is a breeze, ensuring you're always in control of your time with this natural language calendar. For those with complex rotating schedules, this app is also a great fit. Whether you are in healthcare, public safety, or any other profession with rotating shifts, this app adapts to your unique needs. See your rotation patterns and stay informed about your upcoming schedule with Solid Calendar. - Digital planner Say goodbye to traditional paper planners! This digital planner allows you to create, organize, and track tasks. Prioritize tasks, set due dates, and get a clear overview of your to-do list. With synchronization across devices, this planner is accessible anytime, anywhere. - 6 different layouts With Solid Calendar you can find the layout that suits your needs best on each device - Quick Join for video calls You will find options to jump straight into events that have video calls both from the app itself and from notifications - Reminders Your Reminders can live alongside your events in all layouts. You can also create and edit reminders. - Use the calendars on your device Solid Calendar works with the calendars you already have on your device. No data about your calendars leaves your device, so you can have peace of mind about your privacy - Light and Dark mode Enjoy well designed themes for both light and dark mode and pick the one you like best to accommodate your style. - Seamless integration This app easily syncs with all your device's calendars, ensuring that your events and appointments will be scheduled into a routine calendar. You'll never have to stress about missing an essential occasion. All your data remains up-to-date. - Smart reminders Stay on track with smart notifications and reminders. Customize when you will be notified about upcoming events, tasks, or shifts. So, you will be prepared for what's next. - Data security Your privacy is the top priority. This app is designed with advanced security measures to protect your sensitive information. Enjoy the convenience of a digital planner without compromising your data. Your events and reminders remain on your device, they are never uploaded to any third party servers. Cross-device sync Access your schedule and tasks from any iOS device. Whether using your iPhone or iPad, you'll always have your planner at your fingertips. Are you ready to get on top of your schedule? Solid Calendar is a universal app available on iOS, iPadOS, and macOS You can choose to unlock just this app or all 5 Solid Apps with one purchase Terms of service: http://solidapps.co/terms.html Privacy policy: http://solidapps.co/privacy.html
Secure Planner
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With Secure Planner, you can effortlessly create, manage, and organize your to-do lists. Set priorities and deadlines for individual tasks to enhance your productivity and keep track of important tasks. And all securely encrypted! The user-friendly dashboard and various graphics provide you with a clear overview of your progress. Track your daily tasks using the progress bar and quickly identify tasks with high priority that still need to be completed. Security is paramount with Secure Planner. The app employs reliable AES256 and TripleDES encryption combined along with PBKDF2 to securely store your to-do lists. All data remains fully offline, without any cloud connection. Additionally, Secure Planner is open source, giving you peace of mind knowing that your data is protected. Furthermore, Secure Planner offers features such as easy export and import of to-do lists, allowing you to share your data with others or synchronize it across different devices. Your data remains encrypted and safeguarded at all times.
Screenshots
Verdict
The clearest difference is price: Solid Calendar at Free against Secure Planner's $1.99. Secure Planner's advantage is in-app purchases (none vs 2) and update cadence (weekly vs fortnightly). On ads, device support and iOS requirement 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
Solid Calendar is free to download; Secure Planner costs $1.99 up front. Solid Calendar sells 2 one-off in-app purchases. Secure Planner asks for nothing beyond the download.
Solid Calendar ships an update fortnightly, Secure Planner weekly. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.
| Parameter | Solid Calendar | Secure Planner |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.9 (119 ratings) — better | — |
| Positive reviews | 78.9% of reviews | — |
| Number of ratings | 119 — better | — |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 19 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Solid Apps S.R.L. | Christian Scheub |
Bugs and requests
Solid Calendar
Reported bugs
7 issues- Date is a day behind in Australia
- Jumps back to today's date when viewing future dates
- App crashes every time after last update
- Changing daily event time affects rest of week incorrectly
- Weekly view shows all-day events horizontally like timed events
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- Medium widgets have small font sizes and look wrong
- Sync to correct date issue
Requested features
24 requests- Display checkmarks for finished appointments
- Better task management landing pad, floating to-dos
- Option to display little checkmarks for finished appointments
- Floating to-do's on widget page
- Option to display little checkmarks for finished appointments
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- Better task management landing pad, so that daily to-dos do not have to be tied to reminders or calendars.
- Floating to-do’s on my widget page would be rad too.
- Option to display little checkmarks for finished appointments
- Better task management landing pad, so that daily to-dos do not have to be tied to reminders or calendars.
- Floating to-do’s on my widget page would be rad too.
- Display checkmarks for finished appointments
- Better task management landing pad for to-dos
- Floating to-dos on widget page
- Grey out past events in all views
- Allow 45 min event durations
- Time to leave notifications
- Indicator for current place in day's timeline
- Daily briefing notifications
- Hyperlinks when creating reminders
- Option for minimalist widget for following day
- Option to have calendar items crossed out on widgets
- Unique Apple Watch complication
- Include reminders functionality
- Add todo function
Secure Planner
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solid Calendar
- Unlock this app (lifetime)$4.99
- Unlock ALL 10 Solid Apps (lifetime)$9.99
Secure Planner
No in-app purchases









