THUNDER vs Secure Watermark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
THUNDER
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thunder is a logistic company that provide a logistic services , our App allow the client to send,review their orders and follow up with any changes on these orders.
Secure Watermark
Easily protect your sensitive documents and digital creations from unauthorized use. Add custom text, image, or handwritten signature watermarks to photos, IDs, and artwork. Offers advanced customization for text and image placement, with ID mode for seamless document protection.
- Rich text watermarks with full customization
- Image watermarks with adjustable transparency
- Handwritten signature watermarks
- ID mode for secure document protection
- Export as image or PDF at 300 DPI
- Watermark management list
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[Applicable scenarios] - Protect your ID card, bank card, driver's license and other ID photos to prevent unauthorized use. - Protect your photos, paintings, digital works to prevent unauthorized use. [Watermark type] The application supports three types of watermarks: rich text watermarks, image watermarks and handwritten signature watermarks, and supports full screen and single watermark functions. [Rich text watermark] - Supports multi-line text watermarks. - Customizable font color, background color, transparency, font style (bold, italic), size, etc. - Provides adjustment functions for alignment, line spacing, watermark spacing and rotation angle. [ID mode] - ID mode supports importing ID card front and back images, and automatically adjusts to A4 paper size to ensure that the printing effect is consistent with the actual object. - You can choose to display the ID card outline and support manual scaling of the image. - Can be exported as an image or PDF document, with an output resolution of 300 DPI A4 paper. [Image watermark] - Customized images can be inserted as watermarks. - Supports adjusting image size, transparency, watermark spacing and rotation angle. [Handwritten Signature Watermark] - Provides multiple pen stroke types such as fountain pen, water pen, etc. - Customizable stroke color and size. - Supports undo, redo functions and eraser. - Provides a convenient watermark management list.
Screenshots
Verdict
The clearest difference is update cadence: Secure Watermark at every 2 weeks against THUNDER's every 11 months. THUNDER's advantage is iOS requirement (14.0 vs 17.0). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
THUNDER ships an update every 11 months, Secure Watermark every 2 weeks. The most recent releases landed on September 26, 2026 and June 1, 2026 respectively.
| Parameter | THUNDER | Secure Watermark |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 11 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 54 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Rubik Smart Solutions | 泽海 黄 |
In-app purchases
THUNDER
No in-app purchases
Secure Watermark
No in-app purchases
Questions
Is THUNDER free?
Is Secure Watermark free?
Do THUNDER or Secure Watermark have ads?
Which is updated more often, THUNDER or Secure Watermark?
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