Solid Calendar vs roamOS
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
roamOS
Seamlessly integrate your Roam Research knowledge base into your daily workflow. Capture ideas instantly, access notes via system search, and view tasks with customizable widgets without interrupting your focus.
- Instant capture via Siri and shortcuts
- Customizable home screen widgets
- System-wide search integration
- Natural language queries
- Cross-device compatibility (iPhone, iPad, Mac)
- One-time purchase with lifetime updates
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You've built the perfect knowledge system in Roam. But it's locked away from where you actually work. Your breakthrough insights hit during Zoom calls, but opening Roam breaks your flow. Every TODO check means app switching. Every lookup interrupts your momentum. Your second brain can't help if you can't access it. roamOS bridges your knowledge and your workflow. Finally, your Roam graph works everywhere you do. Capture thoughts instantly via Siri, access notes through system search, and see your TODOs in beautiful widgets. No more app switching. No more lost insights. Instant Capture That brilliant idea hits during a meeting? Capture it instantly with Siri voice commands, keyboard shortcuts, or the quick launcher. Your thoughts flow directly into Roam without breaking focus. Beautiful Widgets Transform your morning routine with customizable widgets that surface exactly what you need. Your TODOs, recent notes, and daily reminders - right on your home screen where you'll actually see them. System-Wide Access Your knowledge becomes part of your system. Press Command+Space on Mac or swipe down on iPhone - search for any thought and jump directly to context. Your Roam graph integrates seamlessly with Spotlight search. Natural Language Queries Ask naturally and get instant results. "Yesterday's TODOs," "meetings this week," or "notes about pricing" - no Datalog required. Just think and ask. Complete Integration Works beautifully across iPhone, iPad, and Mac. Your second brain follows you everywhere - menubar access, Siri shortcuts, system search, and gorgeous widgets that actually help. Built by Roam users, for Roam users. Stop switching apps to access your thoughts. Your knowledge system deserves to work as hard as you do. One-time purchase. Lifetime updates. No subscriptions. Perfect for knowledge workers, researchers, writers, and anyone building their second brain in Roam Research.
Screenshots
Verdict
The clearest difference is review sentiment: Solid Calendar at 79% against roamOS's 33%. Solid Calendar also leads on price (Free vs $19.99) and rating (4.9 vs 1.0). roamOS's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs fortnightly). On ads, monetization model 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
Solid Calendar is free to download; roamOS costs $19.99 up front. Solid Calendar sells 2 one-off in-app purchases. roamOS asks for nothing beyond the download.
Solid Calendar holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Solid Calendar has 119 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 79% of Solid Calendar's written reviews are positive against 33% of roamOS's.
Solid Calendar ships an update fortnightly, roamOS every 4 days. The most recent releases landed on September 23, 2026 and September 7, 2026 respectively.
| Parameter | Solid Calendar | roamOS |
|---|---|---|
| Price | Free — better | $19.99 |
| Rating | 4.9 (119 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 78.9% of reviews — better | 33.3% of reviews |
| Number of ratings | 119 — better | 1 |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Mac — better | iPhone, Mac |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 19 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Solid Apps S.R.L. | Ryan Sonnek |
Customer experience
Solid Calendar
roamOS
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
roamOS
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
roamOS
No in-app purchases
Questions
Is Solid Calendar free?
Is roamOS free?
Which has better reviews, Solid Calendar or roamOS?
Do Solid Calendar or roamOS have ads?
Which is updated more often, Solid Calendar or roamOS?
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