# SmartPLL vs Ruler

The clearest difference is ads: SmartPLL at none against Ruler's shown. SmartPLL also leads on device support (3 vs 1) and iOS requirement (13.1 vs 16.4). Ruler's advantage is update cadence (every 2 weeks vs every 3 months). On price 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.

SmartPLL ships an update every 3 months, Ruler every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SmartPLL | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smartpll/id1623497556/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 87 MB |
| Requires iOS | **13.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Z-Communications](https://appshunter.io/developer/1285508714) | [MOODLR DESENVOLVIMENTO DIGITAL LTDA](https://appshunter.io/developer/981625898) |

## What reviewers say

### SmartPLL

[App page](https://appshunter.io/ios/app/smartpll/id1623497556)

This application allows users to program and control Z-COMM SSG series Smart Phase Locked Loop (PLL) modules. Adjust frequency, sweep mode, step time, and power output via Bluetooth or USB. Features LED status indicators and a rugged enclosure for versatile use.

**Highlights:** Programmable frequency, sweep, and step settings, Bluetooth and USB connectivity, LED status indicators, Rugged enclosure for field use, Internal or external reference input, High performance RF tool

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

**In-app purchases:** none


### Ruler

[App page](https://appshunter.io/ios/app/ruler-measure-level-and-tools/id6792898860)

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

**In-app purchases:** none


## Frequently asked questions

### Is SmartPLL free?

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

### Is Ruler free?

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

### Do SmartPLL or Ruler have ads?

Ruler shows ads; SmartPLL does not.

### Which is updated more often, SmartPLL or Ruler?

SmartPLL ships an update every 3 months, and Ruler every 2 weeks. Most recently, SmartPLL was updated on November 3, 2026 and Ruler on October 31, 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.*