# DuoCal vs GP Partner

The clearest difference is in-app purchases: GP Partner at none against DuoCal's 2. GP Partner also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). DuoCal's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.6). On price there is nothing between them.

Both are free to download. DuoCal sells 2 one-off in-app purchases. GP Partner asks for nothing beyond the download.

DuoCal ships an update every 3 months, GP Partner every 3 weeks. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | DuoCal | GP Partner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/duocal/id1502205499/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 24 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [WAZAnauts LLC](https://appshunter.io/developer/1452730041) | [DigiStashing](https://appshunter.io/developer/1850124075) |

## What reviewers say

### DuoCal

[App page](https://appshunter.io/ios/app/duocal/id1502205499)

Compare monthly calendars side-by-side from different years or months. Organize events with customizable labels and share your schedule with others. Syncs with iOS and Google calendars.

**Highlights:** Side-by-side calendar view, Multiple calendar creation, Calendar sharing via Dropbox, iOS and Google Calendar sync, Customizable labels with colors and sizes, Label templates, Memos separate from dates

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Import Palu calendars | $0.99 | one-time |
| Remove Ads | $8.99 | one-time |


### GP Partner

[App page](https://appshunter.io/ios/app/gp-partner/id6754793393)

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

**In-app purchases:** none


## Frequently asked questions

### Is DuoCal free?

DuoCal is free to download, with in-app purchases available.

### Is GP Partner free?

GP Partner is free to download, with no in-app purchases.

### Do DuoCal or GP Partner have ads?

DuoCal shows ads; GP Partner does not.

### Which is updated more often, DuoCal or GP Partner?

DuoCal ships an update every 3 months, and GP Partner every 3 weeks. Most recently, DuoCal was updated on October 2, 2026 and GP Partner on October 18, 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.*