VirtualKim vs The Assembler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VirtualKim
Experience the 6502 microprocessor, the heart of 1970s home computers. This app emulates the 8-bit processor with an assembler and programming puzzles. Learn to code on a minimalist interface and discover how early computing was done.
- 6502 CPU emulation
- Built-in assembler
- Programming puzzles
- Minimalist UI with LEDs and buttons
- Monitor program for memory editing
- Debug and run applications
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The 6502 microprocessor changed the world. Released in the 1970’s, it was the reason that home computers were within the reach of many hobbyists. This app re-creates the 6502 CPU and some of the hardware that used it. This isn't a game (although games are included), this is an emulation of the 8-bit processor, complete with an assembler and some programming puzzles to solve. Start with the most basic user interface you can imagine - six 7-segment LEDs and some buttons - to enter, debug and run your applications. Then upgrade to a display and keyboard, and use the built-in monitor program to dump memory, makes edits and execute your code. Can you run BASIC? Maybe. FORTH? Perhaps. Assembler? Definitely! Don't think of this as a something "fun" or "enjoyable" in the traditional sense. Think of it as a puzzle: how on earth did those folks in the 1970's manage to do ANYTHING when computers were this basic? Documentation is provided, but to get the most of out of this app you'll need to do your own research. Just like in the 1970s. Features - KIM-1 keypad/LED mode simulator. - KIM-1 serial terminal mode simulator. - Apple 1 serial terminal mode simulator. - Multiple programs including Life, Mastermind, word games, Trek, and more. - Working 6502 Assembler with single-step, memory and register view. - A comprehensive 6502 tutorial system with interactive lessons and reference material. - Shareware! All features are always available without a purchase.
The Assembler
Learn Assembly programming and binary operations by creating pixel art. Each chapter introduces new operations, using 8-bit registers as your canvas to manipulate values and paint an 8x8 image. This app offers a fun, introductory approach to coding fundamentals.
- Learn Assembly programming
- Understand binary operations
- Create pixel art on registers
- Ten chapters with progressive learning
- Interactive 8x8 canvas
- Introduction to programming fundamentals
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Learn Assembly programming and binary operations by painting little pixel art pieces. The app teaches different operations in each of the ten chapters. For each of the chapters you program an image with a limited set of commands. Eight rows of 8-Bit Registers turn into your canvas. Use Assembly to manipulate the values in every register, thus creating an 8x8 painting. 'The Assembler' was made as a small and fun introduction to Assembly, Programming and the Binary system that powers it all. The first version of this app was made for the Swift Student Challenge 2022 and won! I hope that you enjoy this project as much as I have.
Screenshots
Verdict
The clearest difference is in-app purchases: The Assembler at none against VirtualKim's 1. VirtualKim's advantage is update cadence (weekly vs every 5 months). On price, rating, review sentiment and ratings volume 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
Both are free to download. VirtualKim sells 1 one-off in-app purchase. The Assembler asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for VirtualKim against 4.8 for The Assembler. Both are backed by a comparable volume of ratings — 29 and 10 respectively. Written reviews are what separate them: 85% of VirtualKim's written reviews are positive against 78% of The Assembler's.
VirtualKim ships an update weekly, The Assembler every 5 months. The most recent releases landed on September 9, 2026 and August 17, 2026 respectively.
| Parameter | VirtualKim | The Assembler |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (29 ratings) | 4.8 (10 ratings) |
| Positive reviews | 84.6% of reviews — better | 77.8% of reviews |
| Number of ratings | 29 — better | 10 |
| Update frequency | Weekly — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Vision Pro |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 72 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | John Kennedy | Lena Mattea Stoexen |
Customer experience
VirtualKim
The Assembler
In-app purchases
VirtualKim
- Buy Me a Coffee$0.99
The Assembler
No in-app purchases
