# AddCalc PRO vs Event Days Timer

The clearest difference is price: Event Days Timer at Free against AddCalc PRO's $0.99. Event Days Timer also leads on update cadence (weekly vs every 6 weeks) and review sentiment (100% vs 86%). AddCalc PRO's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). On ads, monetization model and device support there is nothing between them.

Event Days Timer is free to download; AddCalc PRO costs $0.99 up front. Event Days Timer sells 1 one-off in-app purchase. AddCalc PRO asks for nothing beyond the download.

AddCalc PRO ships an update every 6 weeks, Event Days Timer weekly. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | AddCalc PRO | Event Days Timer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Paid | Paid |
| Size | 4 MB | 6 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shinichi Aokawa](https://appshunter.io/developer/502862033) | [Wujie Yibang (fuzhou) Software Technology Co., Ltd](https://appshunter.io/developer/1895443936) |

## What reviewers say

### AddCalc PRO

[App page](https://appshunter.io/ios/app/addcalc-pro/id502862030)

This calculator app offers both standard and adder calculation modes, with customizable themes, sounds, and editing features. It allows for easy copying of logs and totals, and supports various calculation functions for accounting and everyday use.

**Highlights:** Dual calculator modes (adder and standard), Customizable button design, background, and brightness, Selectable sound effects, Input log editing and recalculation, Voice reading of input log, Copy log and total functionality, Decimal point and rounding switching

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

**In-app purchases:** none


### Event Days Timer

[App page](https://appshunter.io/ios/app/event-days-timer-countdown/id6790069435)

Track time elapsed and remaining for important dates like anniversaries, exams, and deadlines. Organize events into past, future, or recurring lists with customizable display units and system alarms. Sync data across devices and personalize the look with various themes and widgets.

**Highlights:** Elapsed, Countdown, and Recurring event lists, Customizable display units (year, month, day, hour, minute, second), System-level alarms with default ringtone, Home screen widgets and lock-screen layouts, Optional iCloud sync for data, Gregorian and lunar calendar support, Archiving of past events

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |


## Frequently asked questions

### Is AddCalc PRO free?

AddCalc PRO costs $0.99, with no in-app purchases.

### Is Event Days Timer free?

Event Days Timer is free to download, with in-app purchases available.

### Do AddCalc PRO or Event Days Timer have ads?

Neither AddCalc PRO nor Event Days Timer shows ads.

### Which is updated more often, AddCalc PRO or Event Days Timer?

AddCalc PRO ships an update every 6 weeks, and Event Days Timer weekly. Most recently, AddCalc PRO was updated on November 10, 2026 and Event Days Timer on November 6, 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.*