# Calenda vs TIMER Operation

The clearest difference is in-app purchases: TIMER Operation at none against Calenda's 1. Calenda's advantage is update cadence (every 4 days vs every 2 weeks) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Calenda sells 1 one-off in-app purchase. TIMER Operation asks for nothing beyond the download.

Calenda ships an update every 4 days, TIMER Operation every 2 weeks. The most recent releases landed on November 2, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Calenda | TIMER Operation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (139 ratings)](https://appshunter.io/ios/app/calenda-simple-calendar-app/id1034118429/reviews)** | — |
| Number of ratings | **139** | — |
| Positive reviews | 11.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 67 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [B TO J PTY LTD](https://appshunter.io/developer/569308231) | [Gopi Gadhiya](https://appshunter.io/developer/1387816354) |

## What reviewers say

### Calenda

[App page](https://appshunter.io/ios/app/calenda-simple-calendar-app/id1034118429)

Manage your daily schedule with a stylish and personalized calendar app. Offers multiple views, customizable designs, and seamless syncing with existing calendars. Set reminders to never miss an event.

**Highlights:** Multiple calendar views (Day, Week, Month, List), Customizable color schemes and fonts, Seamless syncing with iCloud and other calendars, Customizable event reminders, User-friendly and intuitive interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited events | $7.99 | one-time |

**What reviewers like**

- 👍 Good monthly view
- 👍 Nice layout
- 👍 Easy to use
- 👍 Great customer support (one instance)

**What reviewers complain about**

- 🐛 Calendar wiped/data disappeared
- 🐛 Cannot delete events
- 🐛 Forced payment for more events
- 🐛 Colors don't work/save
- 🐛 Sync issues with other calendars

**Reported bugs**

- Calendar data wiped
- Cannot delete events
- Event colors not saving
- Purchase not restoring
- App not saving calendar

**Requested features**

- Ability to delete events
- Ability to change event colors
- Ability to change start of week
- Reminder widget
- Add place for events


### TIMER Operation

[App page](https://appshunter.io/ios/app/timer-operation/id6751494054)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calenda free?

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

### Is TIMER Operation free?

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

### Do Calenda or TIMER Operation have ads?

Neither Calenda nor TIMER Operation shows ads.

### Which is updated more often, Calenda or TIMER Operation?

Calenda ships an update every 4 days, and TIMER Operation every 2 weeks. Most recently, Calenda was updated on November 2, 2026 and TIMER Operation on October 23, 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.*