# When2Do vs SeeYou Calendar

When2Do and SeeYou Calendar are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

When2Do ships an update every 10 days, SeeYou Calendar weekly. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | When2Do | SeeYou Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/when2do/id1672746901/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Free | — |
| Size | 2 MB | 75 MB |
| Requires iOS | 16.1 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Danilo Bottini](https://appshunter.io/developer/304768858) | [Seeyou Calendar](https://appshunter.io/developer/1853941691) |

## What reviewers say

### When2Do

[App page](https://appshunter.io/ios/app/when2do/id1672746901)

This app helps you plan your activities by scheduling them based on duration, deadline, and your work schedule. It tracks task progress and can export data to CSV. View your overall schedule in a GANTT style.

**Highlights:** Automated activity scheduling, Task duration and deadline input, Work schedule and holiday consideration, Task execution status tracking, CSV data export, GANTT style schedule view

**Features:** macOS Compatibility

**In-app purchases:** none


### SeeYou Calendar

[App page](https://appshunter.io/ios/app/seeyou-calendar/id6755446117)

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

**In-app purchases:** none


## Frequently asked questions

### Is When2Do free?

When2Do is free to download, with no in-app purchases.

### Is SeeYou Calendar free?

SeeYou Calendar is free to download, with no in-app purchases.

### Do When2Do or SeeYou Calendar have ads?

Neither When2Do nor SeeYou Calendar shows ads.

### Which is updated more often, When2Do or SeeYou Calendar?

When2Do ships an update every 10 days, and SeeYou Calendar weekly. Most recently, When2Do was updated on September 29, 2026 and SeeYou Calendar on October 3, 2026.

---

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