Comparison

VirtualKim vs RISC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 6502 CPU emulation
  • Built-in assembler
  • Programming puzzles
  • Minimalist UI with LEDs and buttons
  • Monitor program for memory editing
  • Debug and run applications
Features
Read full description

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.

About

RISC

Simulate a complete 32-bit mobile system, including CPU units and memory. Write and debug assembly code directly on the simulated hardware to understand its inner workings.

Highlights
  • 32-bit system simulation
  • CPU unit simulation
  • Memory subsystem simulation
  • Native assembly coding
  • Built-in debugger
  • Hardware analysis
Features
Read full description

RISC-V Assembly Simulator is a mobile 32-bit system simulator. The app simulates the entire system, all the way from each individual unit on a CPU to the memory subsystem. Write assembly natively to the CPU, with a built-in debugger so you can analyze your code and see what the hardware is doing. This app is designed to allow you to learn how to write assembly from your mobile device, simulating a real CPU at your devices maximum speed. Visualize how the hardware works if you want to, see all the registers, see your entire memory subsystem for each cycle. Learn the components of this individual CPU. This app currently supports the base Int for RV32 along with the M extension, allowing multiplication and division. Dual core systems are supported with the atomic instructions. This app features a built in assembler to allow you to learn to write code along with descriptive errors. Code along with Apple Intelligence, giving you advice and helping you fix bugs along the way (experimental). Natively integrated with your devices file system, allowing seamless transfer between devices and potentially other sources.

Screenshots

VirtualKim4 screens
RISC4 screens

Verdict

The call

The clearest difference is in-app purchases: RISC at none against VirtualKim's 1. RISC also leads on review sentiment (100% vs 85%). VirtualKim's advantage is ratings volume (31 vs 1) and iOS requirement (17.0 vs 26.0). On price, rating, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. VirtualKim sells 1 one-off in-app purchase. RISC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RISC holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: VirtualKim has 31 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 85% of VirtualKim's written reviews are positive against 100% of RISC's.

UpkeepUpdate frequency

VirtualKim ships an update weekly, RISC every 2 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
VirtualKim versus RISC: the parameters behind the verdict, then further details
ParameterVirtualKimRISC
PriceFreeFree
Rating4.8 (31 ratings)5.0 (1 ratings) — better
Positive reviews84.6% of reviews100.0% of reviews — better
Number of ratings31 — better1
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.0 — better26.0
Further details — not scored
Size72 MB3 MB
Age rating4+4+
DeveloperJohn KennedyMatthew Jacobs

Customer experience

VirtualKim

All ratings29 ratings
Positive96.6%
Neutral3.4%
Negative0.0%
Written reviews26 reviews
Positive84.6%
Neutral11.5%
Negative3.8%

RISC

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

VirtualKim

One-time1
  • Buy Me a Coffee$0.99
None

RISC

No in-app purchases

Questions

Is VirtualKim free?
VirtualKim is free to download, with in-app purchases available.
Is RISC free?
RISC is free to download, with no in-app purchases.
Which has better reviews, VirtualKim or RISC?
RISC is rated higher. VirtualKim averages 4.8 out of 5 from 31 ratings, while RISC averages 5.0 from 1 ratings.
Do VirtualKim or RISC have ads?
Neither VirtualKim nor RISC shows ads.
Which is updated more often, VirtualKim or RISC?
VirtualKim ships an update weekly, and RISC every 2 weeks. Most recently, VirtualKim was updated on October 24, 2026 and RISC on October 30, 2026.

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