Trial&Error vs Ideal Calendar
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Trial&Error
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Trail and error is an app that looks back on what you have done and how you can modify your actions to better achieve your goals. You can use this app like how you would use a sticky note on a board. Organize your thoughts and categorize them into what you have already tried , what you were able to accomplish, what you can try next. Similar to the KPT (keep, problem, try) method, this is a retrospective method. The content entered is saved on your device. not sent to a server. Making your data secure. Alternatively you can upload your note to iCloud for backup. In the future, if the number of users increases, we may add a function to share / post the described data, but when adding the function, sharing / posting will be executed by the user's operation. Details will be described in the version upgrade information. The functions of this application are as follows. [Function] γ»List multiple things you want to achieve γ» A list of trial and error actions is displayed, such as "What to try", "What you could do", "What you understood", "What to do next". γ» Backup to iCloud and data loading from iCloud. [Terms of use] https://oz-app.blogspot.com/p/blog-page_5.html (You can switch languages ββfrom Translate at the top of the page.) [Privacy policy] https://oz-app.blogspot.com/p/blog-page_38.html (You can switch languages ββfrom Translate at the top of the page.)
Ideal Calendar
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A calendar that opens on one number: how many hours of today are still yours. A calendar tells you which hours are taken. What you actually want to know is the opposite. β Your free time, on the home screen Take the hours you're awake. Subtract what's ahead of you. "Bed at 11. It's 7 now. One hour booked at 9." β three hours left. That number is the first thing you see when you open the app. Add an event and it drops, right there. β No manual Long-press to add an event. Drag to move it. Swipe to delete it. Every year you've spent with a phone is the only instruction manual you need. "It probably works like thisβ¦" β and your instinct is always right. β What that time is being traded for Add a shift and your pay is worked out from your hourly rate, including night, overtime and holiday premiums. You can see what your free time turned into. β Also β’ One tap between month and week view β’ Drag across the week view to create; drag an event to move it β’ Colour-code your events and read the month at a glance β’ Attach photos to events and look back on them β’ A lock-screen widget for today's free time β’ Your events, tasks and photos stay on your device. No account required Build your day, your way.
Screenshots
Verdict
The clearest difference is ads: Ideal Calendar at none against Trial&Error's shown. On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Trial&Error sells 2 in-app purchases, starting at $0.49 per month and Ideal Calendar sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Trial&Error ships an update weekly, Ideal Calendar every 8 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.
| Parameter | Trial&Error | Ideal Calendar |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly β better | Every 8 days |
| Ads | Yes | No β better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.4 | 15.1 β better |
| Further details β not scored | ||
| Size | 17 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Naruhito Ozawa | Koki Nakanishi |
In-app purchases
Trial&Error
- Monthly fee$0.491 Month
- PremiumPlan(onetime-purchase)$2.99
Ideal Calendar
- Premium Lifetime$49.99
Questions
Is Trial&Error free?
Is Ideal Calendar free?
Do Trial&Error or Ideal Calendar have ads?
Which is updated more often, Trial&Error or Ideal Calendar?
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