Comparison

THUNDER vs Secure Watermark

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

THUNDER

Features
Read full description

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.

About

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.

Highlights
  • 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
Read full description

[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

THUNDER4 screens
Secure Watermark4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
THUNDER versus Secure Watermark: the parameters behind the verdict, then further details
ParameterTHUNDERSecure Watermark
PriceFreeFree
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 11 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better17.0
Further details — not scored
Size54 MB2 MB
Age rating4+4+
DeveloperRubik Smart Solutions泽海 黄

In-app purchases

None

THUNDER

No in-app purchases

None

Secure Watermark

No in-app purchases

Questions

Is THUNDER free?
THUNDER is free to download, with no in-app purchases.
Is Secure Watermark free?
Secure Watermark is free to download, with no in-app purchases.
Do THUNDER or Secure Watermark have ads?
Neither THUNDER nor Secure Watermark shows ads.
Which is updated more often, THUNDER or Secure Watermark?
THUNDER ships an update every 11 months, and Secure Watermark every 2 weeks. Most recently, THUNDER was updated on September 26, 2026 and Secure Watermark on June 1, 2026.

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