---
title: "ISO - Kerstein & Qualter — App Overview"
url: https://marlvel.ai/apps/iso-kerstein-qualter
category: Entertainment
developer: Marc Kerstein
platforms: ios, android
rating: 5.0 (27 ratings)
pricing: paid
report_level: overview
generated: 2026-04-24
last_verified: "2026-04-24T07:01:01.189Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** ISO is a specialized magic tool that leverages spectator-owned hardware to execute high-impact, impossible-location illusions.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Entertainment |
| Rating | 5.0 ★ (27) |
| Pricing | paid |
| Platforms | iOS, Android |
| Latest Version (iOS) | 1.2.3 |
| Latest Version (Android) | 3.10.0 |
| Developer | Marc Kerstein |

<!-- SECTION: Summary -->
## What is ISO - Kerstein & Qualter?

ISO is a digital utility app designed for magicians to perform complex analogue-style illusions using a spectator's borrowed smartphone. The app enables a variety of classic magic effects, such as bill-to-impossible-location and book tests, while ensuring the performer's own device remains entirely out of play.

<!-- SECTION: Key Features -->
## Key Features

- **Borrowed Device Integration**: Enables the performance of illusions exclusively using the spectator's phone, keeping the performer's device hidden.
- **Bill-to-Impossible-Location**: Facilitates a vanishing bill effect where the serial number on the spectator's original bill is verified against a photo taken on their own device.
- **Versatile Magic Utility**: Supports a wide range of classic effects including book tests, Pegasus page, playing card forces, and stacked deck routines.

<!-- SECTION: Target Audience -->
## Who is it for?

Professional and amateur magicians looking to integrate digital technology into traditional close-up magic routines.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/iso-kerstein-qualter/id1662170624?uo=4)
- [Google Play](https://play.google.com/store/apps/details?id=com.aryeo.isoperfectllc&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/iso-kerstein-qualter)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/iso-kerstein-qualter).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*