# Number Line vs Lazuli 6+

The clearest difference is update cadence: Lazuli 6+ at every 3 weeks against Number Line's every 6 months. Lazuli 6+ also leads on review sentiment (75% vs 60%). Number Line's advantage is price ($1.99 vs $3.99) and iOS requirement (8.0 vs 13.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Number Line costs $1.99 and Lazuli 6+ $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Number Line ships an update every 6 months, Lazuli 6+ every 3 weeks. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Number Line | Lazuli 6+ |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/number-line-elementary-math/id944786903/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 60.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 37 MB | 646 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Simon Storz](https://appshunter.io/developer/924848267) | [funline Media GmbH](https://appshunter.io/developer/1220004570) |

## What reviewers say

### Number Line

[App page](https://appshunter.io/ios/app/number-line-elementary-math/id944786903)

This educational app helps young learners grasp the concept of number scales and ordering. It features interactive game modes where children drag numbers to their correct positions on a number line or identify numbers based on their location. Adjustable difficulty and number ranges cater to different learning levels.

**Highlights:** Number line visualization, Drag and drop number placement, Identify number by position, Adjustable difficulty, Customizable number ranges, High score tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Lazuli 6+

[App page](https://appshunter.io/ios/app/lazuli-6-plus/id1291732892)

This educational app for ages 6 and up offers over 400 challenges across 15 engaging games. It helps children develop essential math, memory, and focus skills through adaptive gameplay and creative free-play activities. Designed by educators, it provides a safe, ad-free learning environment.

**Highlights:** 15 adaptive learning games, Over 400 challenges, Develops math skills, Trains memory and focus, Creative free play mode, Child-friendly environment

**In-app purchases:** none


## Frequently asked questions

### Is Number Line free?

Number Line costs $1.99, with no in-app purchases.

### Is Lazuli 6+ free?

Lazuli 6+ costs $3.99, with no in-app purchases.

### Do Number Line or Lazuli 6+ have ads?

Neither Number Line nor Lazuli 6+ shows ads.

### Which is updated more often, Number Line or Lazuli 6+?

Number Line ships an update every 6 months, and Lazuli 6+ every 3 weeks. Most recently, Number Line was updated on October 12, 2026 and Lazuli 6+ on October 9, 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.*