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App Store Apps > Entertainment > ISO - Kerstein & Qualter
ISO - Kerstein & Qualter icon

ISO - Kerstein & Qualter

by Marc Kerstein · Entertainment · $59.99
On the App Store since February 2023 · Data updated 2026-10-31

ISO - Kerstein & Qualter is made and published by Marc Kerstein. AppBrain is an independent app data site and isn't affiliated with Marc Kerstein. The app name, icon, screenshots and description belong to Marc Kerstein and are shown as published on the App Store.

AppBrain's verdict

Rating on App Store
5.00
28 ratings
Last updated
August 5, 2026
Size
18.6 MB

It doesn't have enough ratings yet to judge what users think.

Official page on the App Store

User feedback

Ratings and reviews on the App Store

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Store listing

By Marc Kerstein, from the App Store
ISO - Kerstein & Qualter Screenshot 1 of 3
ISO - Kerstein & Qualter Screenshot 2 of 3
ISO - Kerstein & Qualter Screenshot 3 of 3
Screenshots by Marc Kerstein, from the the App Store listing
Description by Marc Kerstein Written by the developer, not by AppBrain. Click to read.
“Marc's apps are unbelievable.”
—David Blaine

ISO is a digital solution which enables many analogue effects.

ISO lets you perform miracles using a borrowed phone.

*** You can use ISO for:
- Bill to impossible location
- A book test with ANY printed text (a restaurant menu, a borrowed book, a magazine, etc)
- Pegasus page
- Playing card forces
- Stacked deck effects
...and so much more!

For example... imagine:

- You ask your spectator to borrow a bill, which they place on the table in front of them.
- Using THEIR phone, you openly take a photo of the bill to verify later.
- You crumple the bill into a ball in your hand, and have your spectator hold your wrist.
- You slowly open your hand to show that the bill has now VANISHED!
- The spectator then checks under their bag to find the bill!
- They check the serial number… it MATCHES the photo! It’s the SAME bill!


* Your phone is NEVER in play!
ISO only uses the spectator’s phone during the effect, meaning your phone is never seen.

* Carefully justified in every way
All stages of ISO’s possible effects and routines have been carefully thought through and are justified at each step.

* Works in ANY language
ISO is performable in any language. No text is visible during the effect, and so ISO can be used in any country or region.

* Introducing Serial AR
A new way to use ISO in collaboration with William O'Connell. ISO is now even easier to perform, removing the need to take a photo in advance! (Serial AR requires a one-off, optional in-app purchase. It currently works with GBP, USD, EUR, CAD, HKD, CHF, KRW, BRL, RUP, INR bills, with more being added over time.)

* Multiple pairing methods
Includes an adaptive peek screen, plus optional printable pairing stickers and NFC tag support.

* Fully customisable
The many included settings, features and modes available let you use ISO for many different effects.

* WikiTest pairing integration
Performing ISO can leave your spectator paired and ready to perform WikiTest at the conclusion of ISO’s effect.

* VERY easy to perform
* NO accomplice used
* NO memory work needed

ISO is for entertainment purposes only.
Please get in touch to discuss video/audio/TV/internet broadcasting of any description of this effect.
Official page on the App Store

Safety and technology

Found in the app by AppBrain
Price
$59.99
App size
18.6 MB
Content rating
Everyone

Technologies used by ISO - Kerstein & Qualter

Releases

Updates seen on the App Store
Version
1.2.4
Launched
February 2023

No changelog data

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Rankings

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About the app and developer

About ISO - Kerstein & Qualter

ISO - Kerstein & Qualter is an entertainment app developed by Marc Kerstein.

User Ratings

ISO - Kerstein & Qualter is rated 5.00 out of 5 stars. The rating is based on 28 ratings.

App Information

ISO - Kerstein & Qualter costs $59.99. The app size is 18.56 MB. The latest version available is 1.2.4. The last update was on August 5, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since February 2023.

Developer information for Marc Kerstein

Marc Kerstein

Address:

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