# Days备忘日 vs 倒数321

The clearest difference is price: 倒数321 at Free against Days备忘日's $0.99. 倒数321 also leads on update cadence (monthly vs every 2 months). Days备忘日's advantage is in-app purchases (none vs 17). On ads, device support and iOS requirement there is nothing between them.

倒数321 is free to download; Days备忘日 costs $0.99 up front. 倒数321 sells 17 in-app purchases, starting at $0.99 per month. Days备忘日 asks for nothing beyond the download.

Days备忘日 ships an update every 2 months, 倒数321 monthly. The most recent releases landed on October 8, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Days备忘日 | 倒数321 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.6 (34 ratings)](https://appshunter.io/ios/app/321/id1596420055/reviews)** |
| Number of ratings | — | **34** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | — | Freemium |
| Size | 29 MB | 93 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [勋 李](https://appshunter.io/developer/1492204943) | [MiaoA Technology Co., Ltd.](https://appshunter.io/developer/1596420057) |

## What reviewers say

### Days备忘日

[App page](https://appshunter.io/ios/app/days/id1492204944)

**Features:** macOS Compatibility

**In-app purchases:** none


### 倒数321

[App page](https://appshunter.io/ios/app/321/id1596420055)

This app helps you track important dates with countdowns and reminders. It supports various events like anniversaries, birthdays, holidays, and tasks, offering personalized widgets and cute pet guardians to enhance your experience.

**Highlights:** Countdown and count-up for important dates, Reminders for anniversaries, birthdays, and holidays, Customizable widgets and desktop icons, Photo sharing with friends via widgets, Support for Lunar calendar events, Event categorization and prioritization, Cute pet guardians for events

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 倒数321连续包月优惠 | $0.99 | per month |
| 倒数321连续包月促销 | $1.99 | per month |
| 倒数321月份会员促销 | $2.99 | one-time |
| 倒数321永久会员限时促销 | $2.99 | one-time |
| 倒数321年会员促销 | $3.99 | one-time |
| 倒数321月份会员 | $3.99 | one-time |
| 倒数321永久会员特惠促销 | $3.99 | one-time |
| 倒数321永久会员1折促销 | $3.99 | one-time |
| 倒数321包月会员 | $3.99 | one-time |
| 倒数321包月会员优惠 | $4.99 | one-time |
| 倒数321永久会员限时优惠 | $4.99 | one-time |
| 倒数321永久会员 | $5.99 | one-time |
| 倒数321包月会员促销 | $5.99 | one-time |
| 倒数321年会员 | $9.99 | one-time |
| 倒数321包年会员优惠 | $14.99 | one-time |
| 倒数321包年会员促销 | $14.99 | one-time |
| 倒数321永久会员 | $39.99 | one-time |


## Frequently asked questions

### Is Days备忘日 free?

Days备忘日 costs $0.99, with no in-app purchases.

### Is 倒数321 free?

倒数321 is free to download, with in-app purchases available.

### Do Days备忘日 or 倒数321 have ads?

Neither Days备忘日 nor 倒数321 shows ads.

### Which is updated more often, Days备忘日 or 倒数321?

Days备忘日 ships an update every 2 months, and 倒数321 monthly. Most recently, Days备忘日 was updated on October 8, 2026 and 倒数321 on September 28, 2026.

---

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