# 3D Calculator vs Seismometer ∞

The clearest difference is ads: 3D Calculator at none against Seismometer ∞'s shown. 3D Calculator also leads on update cadence (every 6 days vs every 2 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

3D Calculator ships an update every 6 days, Seismometer ∞ every 2 weeks. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 3D Calculator | Seismometer ∞ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Size | 33 MB | 16 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Luca Tancredi](https://appshunter.io/developer/1879907351) | [辰巳家有限公司](https://appshunter.io/developer/1781943256) |

## What reviewers say

### 3D Calculator

[App page](https://appshunter.io/ios/app/3d-calculator/id6759628212)

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

**In-app purchases:** none


### Seismometer ∞

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

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

**In-app purchases:** none


## Frequently asked questions

### Is 3D Calculator free?

3D Calculator is free to download, with no in-app purchases.

### Is Seismometer ∞ free?

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

### Do 3D Calculator or Seismometer ∞ have ads?

Seismometer ∞ shows ads; 3D Calculator does not.

### Which is updated more often, 3D Calculator or Seismometer ∞?

3D Calculator ships an update every 6 days, and Seismometer ∞ every 2 weeks. Most recently, 3D Calculator was updated on November 9, 2026 and Seismometer ∞ on November 5, 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.*