Comparison

FirstSeed Calendar vs Solid Calendar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FirstSeed Calendar

A powerful scheduling app that manages both events and reminders. It offers innovative calendar views, interactive widgets for various iOS versions, and seamless syncing with Apple's Calendar and Reminders apps. An optional paid upgrade unlocks advanced features like natural language event processing and drag-and-drop functionality.

Highlights
  • Interactive and lock-screen widgets
  • Full-featured month, week, and list views
  • Event and reminder management
  • Natural language event processing (paid)
  • Drag & drop event manipulation (paid)
  • Apple Watch support
  • Syncs with Apple Calendar and Reminders
Features
Read full description

FirstSeed Calendar keeps your events and reminders in one place. It’s fast, flexible, and built so you can handle most tasks with one hand. Features: - Month view that handles everyday tasks with one hand - Week view that fits the whole week on one screen, with no vertical scrolling - Day, list, and year views, including a list view laid out like a paper planner - Events and reminders together in one calendar - Move or duplicate events to multiple dates at once - Respond to invitations right from the app - Daily Summary notifications for today’s or tomorrow’s events - Home Screen, Lock Screen, StandBy, and interactive widgets, including a timeline widget - Control Center controls - Apple Watch app with complications - Dark mode, custom themes, and colors for weekends and holidays - Designed for Liquid Glass, with clear and tinted icons and widgets Pro: One-Time Purchase, No Subscription: - Sync directly with Google Calendar, including per-event colors - Trash: recover deleted events and reminders for up to 30 days - Automatic backups of your calendar data - Quick Event: create events by typing naturally, like “Lunch with Bob at noon tomorrow” - Full-screen alarms for events you can’t miss - Weather forecasts in your calendar - Week numbers, time zones, and event history - Drag and drop to reschedule events - Templates for events you create often - Calendar sets to show or hide groups of calendars with one tap - Import and export ICS files - Customize the Apple Watch app - Alternate app icons - No ads Sync: FirstSeed Calendar works with Apple’s Calendar and Reminders apps, so your events and reminders stay in sync across all your devices through iCloud, Google, Exchange, and any other accounts you’ve added in Settings.

About

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.

Highlights
  • 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
Features
Read full description

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

Screenshots

FirstSeed Calendar4 screens
Solid Calendar4 screens

Verdict

The call

The clearest difference is ads: Solid Calendar at none against FirstSeed Calendar's shown. Solid Calendar also leads on iOS requirement (16.0 vs 26.0). FirstSeed Calendar's advantage is monetization model (free with in-app purchases vs paid). On price, rating, review sentiment and ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FirstSeed Calendar sells 2 in-app purchases, starting at $2.99 per month and Solid Calendar sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Solid Calendar holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 337 and 120 respectively. Written reviews complicate that: 81% of FirstSeed Calendar's written reviews are positive against 79% of Solid Calendar's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

FirstSeed Calendar ships an update every 8 days, Solid Calendar fortnightly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 7 level
FirstSeed Calendar versus Solid Calendar: the parameters behind the verdict, then further details
ParameterFirstSeed CalendarSolid Calendar
PriceFreeFree
Rating4.7 (337 ratings)4.9 (120 ratings) — better
Positive reviews80.5% of reviews — better78.9% of reviews
Number of ratings337 — better120
Update frequencyEvery 8 days — betterFortnightly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac
Requires iOS26.016.0 — better
Further details — not scored
Size67 MB19 MB
Age rating4+4+
DeveloperFirstSeed IncSolid Apps S.R.L.

Customer experience

FirstSeed Calendar

All ratings336 ratings
Positive92.6%
Neutral3.9%
Negative3.6%
Written reviews298 reviews
Positive80.5%
Neutral7.0%
Negative12.4%

Solid Calendar

All ratings119 ratings
Positive97.5%
Neutral0.8%
Negative1.7%
Written reviews38 reviews
Positive78.9%
Neutral2.6%
Negative18.4%

Bugs and requests

FirstSeed Calendar

Not enough reviews yet to summarise bugs or 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
Show 2 more
  • 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
Show 19 more
  • 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

In-app purchases

2 purchases

FirstSeed Calendar

Subscriptions1
  • Monthly Donation$2.991 Month
One-time1
  • Pro Version$9.99
2 purchases

Solid Calendar

One-time2
  • Unlock this app (lifetime)$4.99
  • Unlock ALL 10 Solid Apps (lifetime)$9.99

Questions

Is FirstSeed Calendar free?
FirstSeed Calendar is free to download, with in-app purchases available.
Is Solid Calendar free?
Solid Calendar is free to download, with in-app purchases available.
Which has better reviews, FirstSeed Calendar or Solid Calendar?
Solid Calendar is rated higher. FirstSeed Calendar averages 4.7 out of 5 from 337 ratings, while Solid Calendar averages 4.9 from 120 ratings.
Do FirstSeed Calendar or Solid Calendar have ads?
FirstSeed Calendar shows ads; Solid Calendar does not.
Which is updated more often, FirstSeed Calendar or Solid Calendar?
FirstSeed Calendar ships an update every 8 days, and Solid Calendar fortnightly. Most recently, FirstSeed Calendar was updated on October 29, 2026 and Solid Calendar on October 27, 2026.

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