# 倒计时备忘录 vs PDF翻译

The clearest difference is in-app purchases: 倒计时备忘录 at none against PDF翻译's 3. PDF翻译's advantage is update cadence (every 3 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF翻译 sells 3 in-app purchases, starting at $7.99 per month. 倒计时备忘录 asks for nothing beyond the download.

倒计时备忘录 ships an update fortnightly, PDF翻译 every 3 days. The most recent releases landed on October 20, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 倒计时备忘录 | PDF翻译 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdf/id6755518596/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 9 MB | 11 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HangZhou Cina Information Technology Company Co.Ltd](https://appshunter.io/developer/527522104) | [Tianjin Junray Technology Co., Ltd.](https://appshunter.io/developer/1792139982) |

## What reviewers say

### 倒计时备忘录

[App page](https://appshunter.io/ios/app/id6751483252)

This app helps you remember important dates and events with countdowns and timely reminders. Set alerts for upcoming milestones, anniversaries, or tasks, and even hide sensitive items behind a password.

**Highlights:** Countdown reminders for future events, Timing reminders for past events, Set reminders at specific times or days in advance, Option to hide sensitive reminders with a password, Multiple reminder time points

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

**In-app purchases:** none


### PDF翻译

[App page](https://appshunter.io/ios/app/pdf/id6755518596)

Translate PDFs while preserving original formatting. Get a standalone translated document or a bilingual side-by-side version. Handles complex layouts, formulas, and images, with batch processing for large files.

**Highlights:** Standalone translated PDF output, Bilingual side-by-side PDF, Preserves original layout, formulas, tables, Batch and large file translation, Image and scanned document translation, Background processing with resume

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月 | $7.99 | per month |
| 单次翻译 | $0.99 | one-time |
| 永久会员 | $39.99 | one-time |


## Frequently asked questions

### Is 倒计时备忘录 free?

倒计时备忘录 is free to download, with no in-app purchases.

### Is PDF翻译 free?

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

### Do 倒计时备忘录 or PDF翻译 have ads?

Neither 倒计时备忘录 nor PDF翻译 shows ads.

### Which is updated more often, 倒计时备忘录 or PDF翻译?

倒计时备忘录 ships an update fortnightly, and PDF翻译 every 3 days. Most recently, 倒计时备忘录 was updated on October 20, 2026 and PDF翻译 on October 30, 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.*