# GUID vs ToDo Calendar Pro

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.

Both are free to download. ToDo Calendar Pro sells 1 one-off in-app purchase. GUID asks for nothing beyond the download.

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.

## The numbers

| Metric | GUID | ToDo Calendar Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/todo-calendar-pro/id1485076112/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 39 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 33 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Jens Nabert](https://appshunter.io/developer/1341676547) | [NAOAKI SEKIGUCHI](https://appshunter.io/developer/1146328819) |

## What reviewers say

### GUID

[App page](https://appshunter.io/ios/app/guid-generator/id1341676548)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ToDo Calendar Pro

[App page](https://appshunter.io/ios/app/todo-calendar-pro/id1485076112)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ToDo Calendar Pro License | $1.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*