Comparison

Case.one vs Fast Open User

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Fast Open User

Features
Read full description

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

Case.one4 screens
Fast Open User4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Case.one versus Fast Open User: the parameters behind the verdict, then further details
ParameterCase.oneFast Open User
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 months — betterEvery 23 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size27 MB18 MB
Age rating4+4+
DeveloperCase OneELFOK TOO

In-app purchases

None

Case.one

No in-app purchases

None

Fast Open User

No in-app purchases

Questions

Is Case.one free?
Case.one is free to download, with no in-app purchases.
Is Fast Open User free?
Fast Open User is free to download, with no in-app purchases.
Do Case.one or Fast Open User have ads?
Neither Case.one nor Fast Open User shows ads.
Which is updated more often, Case.one or Fast Open User?
Case.one ships an update every 3 months, and Fast Open User every 23 months. Most recently, Case.one was updated on October 4, 2026 and Fast Open User on October 2, 2026.

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