Trial&Error vs First05
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.)
First05
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First05 is a simple focus timer app designed to help you start with just five minutes. When motivation feels low or getting started feels difficult, First05 helps you take a smaller first step. Start a focus session, track your time, and review your recent focus activity in a clear and simple way. Main features: β’ Start a focus session quickly β’ Track your daily focus time β’ Review your recent focus history β’ View simple analysis based on your records β’ Check your session status from the Lock Screen with Live Activities β’ No account required β’ No ads β’ Focus records are stored on your device First05 is made for people who want to start without pressure and gradually build a better focus flow.
Screenshots
Verdict
The clearest difference is in-app purchases: First05 at none against Trial&Error's 2. First05 also leads on ads (none vs shown) and update cadence (every 2 days vs weekly). Trial&Error's advantage is iOS requirement (15.4 vs 17.6). On price 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. First05 asks for nothing beyond the download.
Trial&Error ships an update weekly, First05 every 2 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.
| Parameter | Trial&Error | First05 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 2 days β better |
| Ads | Yes | No β better |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 15.4 β better | 17.6 |
| Further details β not scored | ||
| Size | 17 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Naruhito Ozawa | Rapro |
In-app purchases
Trial&Error
- Monthly fee$0.491 Month
- PremiumPlan(onetime-purchase)$2.99
First05
No in-app purchases









