# Hubble Safety vs Specific Dimension

The clearest difference is iOS requirement: Hubble Safety at 11.0 against Specific Dimension's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Hubble Safety ships an update every 5 weeks, Specific Dimension every 2 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Hubble Safety | Specific Dimension |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 50 MB | 33 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hubble Pte Ltd](https://appshunter.io/developer/1116488777) | [Specific Dimension](https://appshunter.io/developer/1470130216) |

## What reviewers say

### Hubble Safety

[App page](https://appshunter.io/ios/app/hubble-safety/id1316878970)

**Features:** macOS Compatibility

**In-app purchases:** none


### Specific Dimension

[App page](https://appshunter.io/ios/app/specific-dimension/id1470130217)

**In-app purchases:** none


## Frequently asked questions

### Is Hubble Safety free?

Hubble Safety is free to download, with no in-app purchases.

### Is Specific Dimension free?

Specific Dimension is free to download, with no in-app purchases.

### Do Hubble Safety or Specific Dimension have ads?

Neither Hubble Safety nor Specific Dimension shows ads.

### Which is updated more often, Hubble Safety or Specific Dimension?

Hubble Safety ships an update every 5 weeks, and Specific Dimension every 2 months. Most recently, Hubble Safety was updated on October 26, 2026 and Specific Dimension on October 26, 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.*