# Relativistic Space vs Ask Lyra

The clearest difference is in-app purchases: Relativistic Space at none against Ask Lyra's 7. Relativistic Space also leads on iOS requirement (13.0 vs 18.0). Ask Lyra's advantage is update cadence (every 3 months vs every 75 months). On price, ads and device support there is nothing between them.

Both are free to download. Ask Lyra sells 7 in-app purchases, starting at $4.99 per 7 days. Relativistic Space asks for nothing beyond the download.

Relativistic Space ships an update every 75 months, Ask Lyra every 3 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | Relativistic Space | Ask Lyra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/relativistic-space-time/id1463093650/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 75 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 52 MB | 19 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thieberson Gomes](https://appshunter.io/developer/1434771806) | [Atkins Media, LLC](https://appshunter.io/developer/1869503133) |

## What reviewers say

### Relativistic Space

[App page](https://appshunter.io/ios/app/relativistic-space-time/id1463093650)

This educational tool simulates the behavior of space and time at high speeds. Developed as part of a master's dissertation, it focuses on relativistic effects without considering acceleration.

**Highlights:** Relativistic velocity simulation, Space-time behavior visualization, Pedagogical tool, Master's dissertation project

**Features:** macOS Compatibility

**In-app purchases:** none


### Ask Lyra

[App page](https://appshunter.io/ios/app/ask-lyra-the-math-engine/id6765612965)

**Features:** Family Sharing

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ask Lyra Weekly Pro | $4.99 | per 7 days |
| Ask Lyra Monthly Pro | $14.99 | per month |
| Ask Lyra Semester Pro | $34.99 | per 3 months |
| Ask Lyra Annual Pro | $79.99 | per year |
| Spark — 5 Fire Ups | $4.99 | one-time |
| Blaze — 15 Fire Ups | $12.99 | one-time |
| Inferno — 40 Fire Ups | $29.99 | one-time |


## Frequently asked questions

### Is Relativistic Space free?

Relativistic Space is free to download, with no in-app purchases.

### Is Ask Lyra free?

Ask Lyra is free to download, with in-app purchases available.

### Do Relativistic Space or Ask Lyra have ads?

Neither Relativistic Space nor Ask Lyra shows ads.

### Which is updated more often, Relativistic Space or Ask Lyra?

Relativistic Space ships an update every 75 months, and Ask Lyra every 3 months. Most recently, Relativistic Space was updated on October 7, 2026 and Ask Lyra on October 7, 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.*