Case.one vs Fast Open User
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Case.one
Manage legal cases, schedule meetings, and record client interactions on the go. This app integrates seamlessly with your daily workflow, offering voice notes, time tracking, and calendar synchronization.
- Create cases, events, tasks, and notes
- Record client meetings with one touch
- Take voice notes and attach to case files
- Track billable hours manually or with AI
- Synchronize calendar with Google Calendar or iCal
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Take the power of Case.one with you wherever you go. Our sleek mobile app lets you schedule a meeting with a drink in hand, assign tasks before you get to the office, and record client meetings with one touch. Unlike other mobile apps, ours integrates seamlessly with the everyday tasks and routines that you’re already doing. The user experience is so good, you’ll soon start to wonder how you ever lived without it. One Integrated Workspace Create cases, events, tasks, subtasks, documents and notes with one touch. Bring everything together within a single workspace, anytime and anywhere! Voice notes Forget about bulky legal pads – take voice notes and automatically attach them to a case file. Turn your mobile phone into a virtual assistant. Time-tracking You can keep track of billable hours manually or by using artificial intelligence. The system analyzes user behavior and understands his or her habits over time. Calendars Never miss a task, meeting, or other important event ever again. All of your activities will automatically appear in the calendar, which is synchronized with Google calendar or iCal. Please note: A Case.one account is required for log in
Fast Open User
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В настройках приложения Вы можете выбрать способ открытия. Узнайте у администратора модуля текст специальной команды на открытие и укажите её в поле Команда. Поддерживаемые модели: ELfoC C1, ELfoC C2, ELfoC C2-4G, ELfoC B1, ELfoC B2, KATOLA US200-1, KATOLA US200-2, KATOLA US1000-1, KATOLA US1000-2. In the application settings, You can choose the opening method. Ask the administrator of the module the text of the special command for opening and specify it in the Number field. Supported models: ELfoC C1, ELfoC C2, ELfoC C2-4G, ELfoC B1, ELfoC B2, KATOLA US200-1, KATOLA US200-2, KATOLA US1000-1, KATOLA US1000-2.
Screenshots
Verdict
The clearest difference is update cadence: Case.one at every 3 months against Fast Open User's every 23 months. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Case.one ships an update every 3 months, Fast Open User every 23 months. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.
| Parameter | Case.one | Fast Open User |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months — better | Every 23 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 27 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Case One | ELFOK TOO |
In-app purchases
Case.one
No in-app purchases
Fast Open User
No in-app purchases









