证件水印 vs Signed Base Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
证件水印
This utility app allows users to add text watermarks to documents and photos, protecting personal information from misuse. It supports batch processing for up to 50 images and can export in PDF or image formats, including an A4 print mode.
- Add text watermarks
- Protect privacy information
- A4 copy print mode
- Export PDF or image
- Batch watermark up to 50 photos
- No network requests
Read full descriptionHide full description
证件水印 App 是一款为证件、照片添加文字水印的小工具，保障您的隐私信息不被盗用。 - 支持制作 A4 复印打印模式，导出 PDF 或图片格式 - 支持最多 50 张照片批量添加水印 证件水印 App 不会记录任何信息，无网络请求，不会发送任何数据请求，请放心使用。 如果遇到问题，请在设置的反馈中联系我们。
Signed Base Converter
Read full descriptionHide full description
Signed Base Converter is a clean and focused tool for everyday number base conversion. Switch between decimal-to-hexadecimal and hexadecimal-to-decimal conversion, and the input automatically changes to match the selected direction. The app also shows the corresponding binary representation so you can inspect the actual bit pattern at a glance. Signed Base Converter supports both signed and unsigned interpretation, with selectable 8, 16, 32, and 64-bit widths. When you change the bit width or number mode, the app displays the current minimum and maximum values, making it easier to understand valid ranges, two's-complement values, and overflow limits. Key features: Decimal to hexadecimal conversion Hexadecimal to decimal conversion Binary output shown at the same time Signed and unsigned number modes 8, 16, 32, and 64-bit width options Minimum and maximum value display for the current mode Automatic input conversion when switching direction Chinese and English interface support Signed Base Converter is useful for computer science learning, software development, embedded debugging, data inspection, and daily numeric format conversion.
Screenshots
Verdict
The clearest difference is price: Signed Base Converter at Free against 证件水印's $1.99. Signed Base Converter also leads on update cadence (fortnightly vs every 14 months). 证件水印's advantage is ads (none vs shown) and iOS requirement (14.0 vs 17.0). On in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Signed Base Converter is free to download; 证件水印 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
证件水印 ships an update every 14 months, Signed Base Converter fortnightly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | 证件水印 | Signed Base Converter |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (12 ratings) — better | — |
| Positive reviews | 92.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 14 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 10 MB |
| Age rating | 12+ | 4+ |
| Developer | 阳理 江 | 洋 刘 |
In-app purchases
证件水印
No in-app purchases
Signed Base Converter
No in-app purchases
