Comparison

GUID vs ToDo Calendar Pro

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

Head to head
About

GUID

Features
Read full description

What is a GUID? =========== A GUID (Globally Unique Identifier) is a pseudo-random string consisting of 32 letters (A-F) / numbers (0-9) and 4 hyphens. The application area for GUIDs is manifold. For example, GUIDs can be used to uniquely identify objects, files, or documents. What is GUID generator? ================== The GUID generator is a program for generating GUIDs. Furthermore, it is possible to perform a syntactic check of strings, whether they meet the requirements of a GUID, ie the 8-4-4-4-12 format consisting of the allowed characters. Particularities ========== The GUID generator was developed with SWIFT specifically for iOS. As a result, it is optimally integrated into the system, offers optimum app feeling, best performance, requires minimal storage space and system-specific functionalities. Create GUID ========= The core functionality of this program is generating GUIDs. The GUIDs can be generated either in upper case letters or in lower case letters. Check GUID ========= To check the syntax of individual strings, they can be entered in the result text field. Valid strings are colored in green, invalid strings with red color. Interoperability =========== The exchange with other applications is possible via the device's own clipboard (copy and paste) as well as via sharing function of iOS. Summary of functions: ================ - Generate GUID - Check string for GUID-syntax - Copy - Paste - Share - Convert to upper case - Convert to lower case

About

ToDo Calendar Pro

Manage your tasks efficiently with a calendar view that shows due dates. Sync tasks across all your devices via iCloud and automatically register them to other calendar apps. Attach files, create sub-tasks, and receive timely notifications.

Highlights
  • Calendar task overview
  • iCloud task synchronization
  • File and photo attachments
  • Sub-task creation
  • Template-based task registration
  • Integration with iOS Calendar and Google Calendar
  • Apple Watch task viewing
Features
Read full description

Would you like to make your smartphone or tablet PC into a useful business tool? ToDo Calendar Pro is an application to manage your tasks efficiently using a calendar.  The calendar shows you an overview of what tasks are due to be performed and when.  Tasks are synced to all your devices through iCloud, so you can manage your tasks anytime, anywhere.  You can also automatically register tasks to iOS Calendar, iOS Reminder and Google Calendar. ToDo Calendar Pro functions 1. Registering tasks First, let's register your tasks.  By setting a scheduled start date and scheduled end date, you will be able to complete your tasks on time.  You can fill in detailed information and attach photos, videos, Excel, Word or other files and maps in the tasks. Tasks can also be further divided into sub-tasks. 2. Registering tasks using a template By using pre-registered templates, you can easily register tasks. You can customize the template any way you like. 3. Managing tasks in a calendar You can see your tasks in the calendar. The calendar allows you to see which tasks will be performed when. 4. Managing tasks in a list You can also see the tasks in a list. You can see what tasks are currently being performed, what tasks have been completed, and what tasks will be performed in the future. 5. Organizing tasks in groups If you set up groups for tasks, you can view tasks by group in a calendar or a list. You can customize groups any way you like. 6. Task notifications You can specify the tasks to be notified at the scheduled start date and time or at a specified date and time. With notifications, you'll never forget an important task. 7. Linking iOS Calendar, iOS Reminder and Google Calendar You can set up your tasks to work with iOS Calendar, iOS Reminder, and Google Calendar, so they can be registered to iOS Calendar, iOS Reminder, and Google Calendar. 8. Viewing today’s tasks on Apple Watch You can see a list of tasks to be performed today on your Apple Watch. You can also mark completed tasks as completed.

Screenshots

GUID2 screens
ToDo Calendar Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: GUID at none against ToDo Calendar Pro's 1. GUID also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). ToDo Calendar Pro's advantage is update cadence (every 2 months vs every 39 months). On price 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. ToDo Calendar Pro sells 1 one-off in-app purchase. GUID asks for nothing beyond the download.

UpkeepUpdate frequency

GUID ships an update every 39 months, ToDo Calendar Pro every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
GUID versus ToDo Calendar Pro: the parameters behind the verdict, then further details
ParameterGUIDToDo Calendar Pro
PriceFreeFree
Rating—4.2 (5 ratings) — better
Positive reviews—20.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 39 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS12.0 — better17.0
Further details — not scored
Size8 MB33 MB
Age rating4+17+
DeveloperJens NabertNAOAKI SEKIGUCHI

In-app purchases

None

GUID

No in-app purchases

1 purchases

ToDo Calendar Pro

One-time1
  • ToDo Calendar Pro License$1.99

Questions

Is GUID free?
GUID is free to download, with no in-app purchases.
Is ToDo Calendar Pro free?
ToDo Calendar Pro is free to download, with in-app purchases available.
Do GUID or ToDo Calendar Pro have ads?
ToDo Calendar Pro shows ads; GUID does not.
Which is updated more often, GUID or ToDo Calendar Pro?
GUID ships an update every 39 months, and ToDo Calendar Pro every 2 months. Most recently, GUID was updated on November 6, 2026 and ToDo Calendar Pro on November 3, 2026.

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