# Gravitational Force vs MeterWorks Vibrometer

The clearest difference is in-app purchases: Gravitational Force at none against MeterWorks Vibrometer's 1. Gravitational Force also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). MeterWorks Vibrometer's advantage is update cadence (every 2 weeks vs every 6 months). On price and ads there is nothing between them.

Both are free to download. MeterWorks Vibrometer sells 1 one-off in-app purchase. Gravitational Force asks for nothing beyond the download.

Gravitational Force ships an update every 6 months, MeterWorks Vibrometer every 2 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Gravitational Force | MeterWorks Vibrometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Size | 43 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [Emil Deak](https://appshunter.io/developer/1883312248) |

## What reviewers say

### Gravitational Force

[App page](https://appshunter.io/ios/app/gravitational-force-calcon/id1619685815)

**Features:** macOS Compatibility

**In-app purchases:** none


### MeterWorks Vibrometer

[App page](https://appshunter.io/ios/app/meterworks-vibrometer/id6779408803)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MessWerk Pro | $7.99 | one-time |


## Frequently asked questions

### Is Gravitational Force free?

Gravitational Force is free to download, with no in-app purchases.

### Is MeterWorks Vibrometer free?

MeterWorks Vibrometer is free to download, with in-app purchases available.

### Do Gravitational Force or MeterWorks Vibrometer have ads?

Neither Gravitational Force nor MeterWorks Vibrometer shows ads.

### Which is updated more often, Gravitational Force or MeterWorks Vibrometer?

Gravitational Force ships an update every 6 months, and MeterWorks Vibrometer every 2 weeks. Most recently, Gravitational Force was updated on November 7, 2026 and MeterWorks Vibrometer 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.*