Best Mainframe Apps & Games

fullmoon: local intelligence

private and local LLM chat

Free

This app provides a private and offline way to interact with local large language models. It runs models directly on your device, optimized for Apple silicon, and is available across multiple Apple platforms. Personalize your experience and integrate with other apps via Shortcuts.

MainframePunch

Mid-Century Modern Messaging

Free

$4.99 | 100% OFF

Transform your text into animated, retro punch-card videos with authentic hole patterns and sounds. Add custom captions, preview your creations, and share them instantly. All processing is done on your device for maximum privacy.

TN3270

gives easy access to a server

$29.99

This application emulates an IBM 3278 terminal, providing straightforward access to IBM Mainframe systems. It offers standard emulation features, secure connections, and customizable display options for efficient mainframe interaction.

IBM HMC Mobile

for Z and LinuxONE

Free

Monitor and manage your IBM Z and LinuxONE systems remotely from your mobile device. Receive alerts for hardware, OS, and status changes. Control partitions and access detailed configuration information securely.

DEC Opcodes

Reference for DEC computers

Free

Explore the instruction sets of legendary DEC computers like the PDP and VAX. This app provides detailed information on each instruction, historical context, and interactive lessons. Discover the machines that shaped modern computing.

Squares Remastered

by Mainframe SAC

Free

A fast-paced puzzle game testing your reflexes. The objective is to change all blue squares to gray within the time limit. It's a simple yet challenging experience designed for quick play sessions.

ABEND: Meltdown

Abnormal End Puzzle Roguelite

$4.99

Engage in a puzzle roguelite where you play as a rogue AI escaping a government mainframe. Clear rows to attack enemies, chain combos for devastating effects, and collect upgrades to survive escalating dangers across procedurally generated floors. Your choices determine the AI's fate and the narrative's outcome.

Julianator

Julian Day of Year Calculator

$0.99

$1.99 | 50% OFF

Easily convert dates between the Gregorian calendar and the Julian Day of Year (ordinal date). This tool is useful for systems that use day-of-year numbering, such as mainframes, military, and food industries. It offers a clean interface, monthly views, and widgets for quick access.

Supercomputing 2022

by Association for Computing Machinery

Free

This application serves as the official mobile guide for the International Conference for High Performance Computing, Networking, Storage, and Analysis. It provides attendees with essential information and resources for the event.

VMware Explore 2026

Event Guide for Attendees

Free

This official event guide provides attendees with essential information for VMware Explore 2026. Access your personal schedule, browse the full agenda, view sponsor details, and get session information. Stay informed with push notifications during the event.

Valence Portal

by CNX Corporation

Free

Connect to an IBM Power System Server running IBM i from your iOS device. Access apps developed with the Valence Framework and utilize native device features like the camera and GPS.

Prentis - HVAC Troubleshooting

AI Diagnosis & Repair

Free

This app provides hands-free HVAC troubleshooting using voice commands. It helps technicians diagnose issues faster, identify more service opportunities, and generate customer-ready summaries. It supports numerous HVAC makes and models with detailed, model-specific repair guidance.