# Cetvel Ruler vs MeterWorks Teslameter

The clearest difference is in-app purchases: Cetvel Ruler at none against MeterWorks Teslameter's 1. Cetvel Ruler also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. MeterWorks Teslameter sells 1 one-off in-app purchase. Cetvel Ruler asks for nothing beyond the download.

Cetvel Ruler ships an update fortnightly, MeterWorks Teslameter every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Cetvel Ruler | MeterWorks Teslameter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 2 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ozkan Kayhan](https://appshunter.io/developer/1879466347) | [Emil Deak](https://appshunter.io/developer/1883312248) |

## What reviewers say

### Cetvel Ruler

[App page](https://appshunter.io/ios/app/cetvel-ruler/id6759559626)

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

**In-app purchases:** none


### MeterWorks Teslameter

[App page](https://appshunter.io/ios/app/meterworks-teslameter/id6779752009)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Cetvel Ruler free?

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

### Is MeterWorks Teslameter free?

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

### Do Cetvel Ruler or MeterWorks Teslameter have ads?

Neither Cetvel Ruler nor MeterWorks Teslameter shows ads.

### Which is updated more often, Cetvel Ruler or MeterWorks Teslameter?

Cetvel Ruler ships an update fortnightly, and MeterWorks Teslameter every 3 weeks. Most recently, Cetvel Ruler was updated on October 25, 2026 and MeterWorks Teslameter on October 25, 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.*