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  • #: 222804
  • Price: $1.99 In Apple Store
  • Category: Photography
  • Updated: 2010-07-09
  • Current Version: 201007.00
  • 201007.00
  • Size: 1.30 MB
  • Language: English, Japanese
  • Seller: Hideaki Tamori
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 4.0 or later.
  • © samurai-apps
  •  Add to Favorite apps



You can embed the secret image that you draw into your image. Moreover, you can easily send mail to which the secret image is embedded to your friends by using InvisiLetter. If your friends have this application or our free application "InvisiReader", they will be able to see the secret image that you embedded. This is INVISIBLE watermarking application.

Embedding Steps are:

Step1. Select your image which you want to send to your friends.

Step2. Draw the secret image to embed.

Step3. Send a mail attached embedded image.

Extracting Steps are:

Step1. In Mail app, hold (touch long) the received image that is embedded secret image and copy this image onto the clipboard.

Step2. Start InvisiLetter and extract it. Keep Shaking or holding up your iPhone in the sun. After 3 seconds...

The color of the image changes slightly by the embedded process. InivisiLetter supports 480x320 pixel maximum and only PNG format, and NO SUPPORT SMS/MMS.

Please use InvisiLetter to embed...

- A copyright message

- An image caption or an explanation

- A secret message ( Even if the image is seen by the person from whom the message doesn't want to be seen, it is safe... )

- And more...

The FREE reader version of InvisiLetter (which supports only extracting) is launched called "InvisiReader".

In our support page, we will show you how to use this application, and samples of embedded or extracted image, and we launched InvisiLetter API which can embed secret images.

iPhone Screenshots

InvisiLetter iPhone Screenshot 1

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Rated 3/5 based on 1 customer reviews.


3/5 stars


I give the app 3.5 stars. but I give the directions .25 stats. OMG. they're the funniest thing I've ever read. the person who wrote them obviously doesn't speak english and translated using yahoos babelfish. lol. anyway...app is fun


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The information may be outdated (2011-04-28 20:49:51). For actual information go to iTunes

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