Ruler vs OTS Manager
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler
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.
- Accurate screen-based rendering
- Device-specific calibration
- Wide device compatibility
- Precise measurement tool
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You may already noticed that most of ruler apps are actually wrong. Accurate Ruler renders according to screen width spec of the device that your are currently using. So It is accurate. Already tested in following devices including: iPhone X, XR, XS, Max All sizes of iPad 2019 iPhone 4 iPhone 4s iPhone 5 iPhone 5s iPhone 5c iPhone 6 iPhone 6 plus iPhone 6s iPhone 6s plus iPhone se iPhone 7 iPhone 7 plus iPad 2 iPad 3 iPad 4 iPad air iPad air 2 iPad mini iPad min 2 iPad min 3 iPad mini 4 iPad pro, iPod Touch 5/6 If your device is one of them, we insure it is accurate.
OTS Manager
This app consolidates daily trucking operations into one system. It manages dispatch, accounting, and expenses like fuel and maintenance for a streamlined workflow.
- Dispatch management
- Accounting tools
- Fuel expense tracking
- Maintenance expense tracking
- User-friendly interface
- Integrated operations
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The solution provided by Online Trucking Solution is that it brings all daily operations like dispatch, accounting, fuel/maintenance expense, and more under the umbrella of a single, user-friendly system.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Ruler | OTS Manager |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (40 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 53.6% of reviews | — |
| Number of ratings | 40 — better | 2 |
| Update frequency | Every 5 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 4 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | 祥祎 刘 | Harpreet Romana |
Customer experience
Ruler
OTS Manager
Bugs and requests
Ruler
Reported bugs
10 issues- 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)
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- Incompatibility with iOS 13.3 and newer
- Authenticator code clipboard access on launch
- Screen rotation issues
- Inaccurate ruler scaling on iPhone 8, 11, 12, 13, 16 Pro
- App requests rating before allowing use
Requested features
7 requests- 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
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- Ability to disable ads
- Better device detection and compatibility
OTS Manager
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Ruler
No in-app purchases
OTS Manager
No in-app purchases
