# 二次元百科 vs Reckoner Countdown

The clearest difference is in-app purchases: 二次元百科 at none against Reckoner Countdown's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Reckoner Countdown sells 3 in-app purchases, starting at $1.99 per year. 二次元百科 asks for nothing beyond the download.

二次元百科 ships an update monthly, Reckoner Countdown fortnightly. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 二次元百科 | Reckoner Countdown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/reckoner-countdown/id6751704860/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 3 MB | 2 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [宏 林](https://appshunter.io/developer/1496915311) | [占辉 百](https://appshunter.io/developer/1081455103) |

## What reviewers say

### 二次元百科

[App page](https://appshunter.io/ios/app/id1496915312)

**Features:** macOS Compatibility

**In-app purchases:** none


### Reckoner Countdown

[App page](https://appshunter.io/ios/app/reckoner-countdown/id6751704860)

Easily track important dates like birthdays, anniversaries, and deadlines with customizable reminders and widgets. This app helps you stay organized and never miss a special occasion.

**Highlights:** Countdown and anniversary tracking, Exact-time and all-day reminders, Lunar date support, Home and Lock Screen widgets, Automatic theme and icon matching, History view for expired events, iCloud sync

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Premium Membership | $1.99 | per year |
| Monthly Premium Membership | $1.99 | per month |
| Lifetime Premium | $3.99 | one-time |


## Frequently asked questions

### Is 二次元百科 free?

二次元百科 is free to download, with no in-app purchases.

### Is Reckoner Countdown free?

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

### Do 二次元百科 or Reckoner Countdown have ads?

Neither 二次元百科 nor Reckoner Countdown shows ads.

### Which is updated more often, 二次元百科 or Reckoner Countdown?

二次元百科 ships an update monthly, and Reckoner Countdown fortnightly. Most recently, 二次元百科 was updated on October 18, 2026 and Reckoner Countdown on October 15, 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.*