# Meterbox Probes vs Straightness

The clearest difference is iOS requirement: Straightness at 12.0 against Meterbox Probes's 15.6. 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.

Meterbox Probes ships an update every 3 months, Straightness every 2 months. The most recent releases landed on October 12, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Meterbox Probes | Straightness |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 5 MB | 59 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Everbest Machinery Industry Co.,Ltd](https://appshunter.io/developer/564470332) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### Meterbox Probes

[App page](https://appshunter.io/ios/app/meterbox-probes/id1319208214)

**Features:** macOS Compatibility

**In-app purchases:** none


### Straightness

[App page](https://appshunter.io/ios/app/straightness/id6759055500)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Meterbox Probes free?

Meterbox Probes is free to download, with no in-app purchases.

### Is Straightness free?

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

### Do Meterbox Probes or Straightness have ads?

Neither Meterbox Probes nor Straightness shows ads.

### Which is updated more often, Meterbox Probes or Straightness?

Meterbox Probes ships an update every 3 months, and Straightness every 2 months. Most recently, Meterbox Probes was updated on October 12, 2026 and Straightness on October 17, 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.*