# Ruler vs OTS Manager

The clearest difference is rating: OTS Manager at 5.0 against Ruler's 2.6. OTS Manager also leads on update cadence (fortnightly vs every 5 months). Ruler's advantage is ratings volume (40 vs 2) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

OTS Manager holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Ruler has 40 ratings behind it against 2, so its average is the more settled of the two.

Ruler ships an update every 5 months, OTS Manager fortnightly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Ruler | OTS Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (40 ratings)](https://appshunter.io/ios/app/ruler-accurate-ruler/id1084232739/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ots-manager/id1539666981/reviews)** |
| Number of ratings | **40** | 2 |
| Positive reviews | 53.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 4 MB | 42 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [祥祎 刘](https://appshunter.io/developer/1071522659) | [Harpreet Romana](https://appshunter.io/developer/1504605927) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-accurate-ruler/id1084232739)

This application provides a precise measurement tool by rendering according to your device's screen width specifications. It has been tested on a wide range of Apple devices to ensure accuracy for your measuring needs.

**Highlights:** Accurate screen-based rendering, Device-specific calibration, Wide device compatibility, Precise measurement tool

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

**In-app purchases:** none

**What reviewers like**

- ✅ Accurate measurements compared to physical rulers
- 👍 Simple and intuitive user interface
- 🎯 No intrusive ads or minimal advertising
- ⚡ Fast and responsive performance
- 🆓 Free to use application

**What reviewers complain about**

- 🐛 Blank white screen on newer devices
- ❌ No support for iPhone 12 and newer models
- ❌ No support for iPhone X and iPhone 11
- 🔄 App not updated in years
- ⚠️ Device compatibility detection issues

**Reported bugs**

- White/blank screen display on newer iOS versions
- App crashes and freezes on launch
- Ruler not rendering or displaying
- Toggle switches stuck in grey/disabled state
- Incorrect device identification (iPad size misidentification)

**Requested features**

- Support for iPhone 12, 13, 14, 15, 16 and newer models
- Millimeter measurement option
- Longer ruler display
- Fractional inches (1/16, 1/8) instead of decimal inches
- Support for newer iPad models


### OTS Manager

[App page](https://appshunter.io/ios/app/ots-manager/id1539666981)

This app consolidates daily trucking operations into one system. It manages dispatch, accounting, and expenses like fuel and maintenance for a streamlined workflow.

**Highlights:** Dispatch management, Accounting tools, Fuel expense tracking, Maintenance expense tracking, User-friendly interface, Integrated operations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ruler free?

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

### Is OTS Manager free?

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

### Which has better reviews, Ruler or OTS Manager?

OTS Manager is rated higher. Ruler averages 2.6 out of 5 from 40 ratings, while OTS Manager averages 5.0 from 2 ratings.

### Do Ruler or OTS Manager have ads?

Neither Ruler nor OTS Manager shows ads.

### Which is updated more often, Ruler or OTS Manager?

Ruler ships an update every 5 months, and OTS Manager fortnightly. Most recently, Ruler was updated on November 6, 2026 and OTS Manager on November 3, 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.*