# Ask Lyra vs Time Dilation Explorer Lab

The clearest difference is ads: Ask Lyra at none against Time Dilation Explorer Lab's shown. Ask Lyra also leads on iOS requirement (18.0 vs 26.2). On price, in-app purchases 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 and Time Dilation Explorer Lab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Ask Lyra | Time Dilation Explorer Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | — |
| Size | 19 MB | 16 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Atkins Media, LLC](https://appshunter.io/developer/1869503133) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### 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 |


### Time Dilation Explorer Lab

[App page](https://appshunter.io/ios/app/time-dilation-explorer-lab/id6773199521)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $2.99 | one-time |


## Frequently asked questions

### Is Ask Lyra free?

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

### Is Time Dilation Explorer Lab free?

Time Dilation Explorer Lab is free to download, with in-app purchases available.

### Do Ask Lyra or Time Dilation Explorer Lab have ads?

Time Dilation Explorer Lab shows ads; Ask Lyra does not.

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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.*