# Prisma App vs Seismometer ∞

The clearest difference is ads: Prisma App at none against Seismometer ∞'s shown. Prisma App also leads on iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Prisma App | Seismometer ∞ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 weeks |
| Size | 13 MB | 16 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Solution Tech Srl](https://appshunter.io/developer/1485604429) | [辰巳家有限公司](https://appshunter.io/developer/1781943256) |

## What reviewers say

### Prisma App

[App page](https://appshunter.io/ios/app/prisma-app/id1606344064)

**Features:** Vision Pro support

**In-app purchases:** none


### Seismometer ∞

[App page](https://appshunter.io/ios/app/seismometer/id6761700650)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prisma App free?

Prisma App is free to download, with no in-app purchases.

### Is Seismometer ∞ free?

Seismometer ∞ is free to download, with no in-app purchases.

### Do Prisma App or Seismometer ∞ have ads?

Seismometer ∞ shows ads; Prisma App does not.

---

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