# Lattice Multiplication vs Napier's Bones Simulation

The clearest difference is update cadence: Lattice Multiplication at every 10 months against Napier's Bones Simulation's every 25 months. Napier's Bones Simulation's advantage is price ($1.99 vs $3.99) and device support (4 vs 2). On ads and in-app purchases there is nothing between them.

Lattice Multiplication costs $3.99 and Napier's Bones Simulation $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lattice Multiplication ships an update every 10 months, Napier's Bones Simulation every 25 months. The most recent releases landed on September 10, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Lattice Multiplication | Napier's Bones Simulation |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lattice-multiplication/id351024204/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 25 months |
| Monetization | Paid | — |
| Size | 1 MB | 29 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Esa Helttula](https://appshunter.io/developer/339440196) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Lattice Multiplication

[App page](https://appshunter.io/ios/app/lattice-multiplication/id351024204)

Learn and practice the lattice multiplication method with this intuitive app. It guides users step-by-step through solving custom or random multiplication problems, making complex calculations visually clear and easier to understand.

**Highlights:** Step-by-step lattice multiplication guide, Custom and random problem generation, Visual animation of calculation steps, Adjustable difficulty and settings, Intuitive interface with customizable themes, Reinforces times tables practice

**Features:** macOS Compatibility

**In-app purchases:** none


### Napier's Bones Simulation

[App page](https://appshunter.io/ios/app/napiers-bones-simulation/id1093899282)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Lattice Multiplication free?

Lattice Multiplication costs $3.99, with no in-app purchases.

### Is Napier's Bones Simulation free?

Napier's Bones Simulation costs $1.99, with no in-app purchases.

### Do Lattice Multiplication or Napier's Bones Simulation have ads?

Neither Lattice Multiplication nor Napier's Bones Simulation shows ads.

### Which is updated more often, Lattice Multiplication or Napier's Bones Simulation?

Lattice Multiplication ships an update every 10 months, and Napier's Bones Simulation every 25 months. Most recently, Lattice Multiplication was updated on September 10, 2026 and Napier's Bones Simulation on September 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*