Speedometer ٞ vs Optics Workbench
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Speedometer ٞ
This application displays your current speed using GPS and shows the road's speed limit through an online check. It offers features like over-speed alerts, weather updates, and various display modes, including a mirror effect HUD.
- GPS speed display
- Online speed limit check
- Over-speed alerts
- Current weather and temperature
- Mirror effect HUD mode
- Compass
- Apple Watch app
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Display current speed by using GPS. Show speed limit of the road by online check Also: Alert over speed Shows current weather condition and temperature Calculates odometer Calculate altitude Calculate Average speed Calculate maximum speed Show mirror effect HUD (Head-up Display) mode Different colors Compass Apple Watch app Today widget app Landscape and Patriot mode Full Screen mode Speed Camera Display
Optics Workbench
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Optics Workbench is a local-first engineering calculator for optics and machine-vision work. Use the Camera Lens Selector to combine camera resolution, pixel size, working distance, and horizontal field of view. The app immediately estimates focal length, magnification, object-space pixel size, theoretical resolving power, vertical field of view, and target height. See the geometry in a live optical diagram, compare bundled technical lens examples, browse a read-only component library, and generate a shareable report image using the native iOS Share Sheet. Built for engineers, integrators, researchers, students, and anyone evaluating an imaging setup: • 15 bundled camera presets • 9 sensor-format references • 20 technical lens examples • Manual camera and geometry inputs • Metric and U.S. customary display units • English and Simplified Chinese • Local calculations with no account or backend • No ads, subscriptions, in-app purchases, analytics, or tracking Optics Workbench provides simplified engineering estimates. Verify image circle, working distance, distortion, resolving power, field coverage, tolerances, and mounting constraints with current vendor documentation and physical testing before final selection.
Screenshots
Verdict
The clearest difference is device support: Speedometer ٞ at 4 against Optics Workbench's 2. Speedometer ٞ also leads on iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases 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.
| Parameter | Speedometer ٞ | Optics Workbench |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (779 ratings) — better | — |
| Positive reviews | 51.5% of reviews | — |
| Number of ratings | 779 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | UniCom Technology | 浚哲 彭 |
Bugs and requests
Speedometer ٞ
Reported bugs
9 issues- App crashes shortly after startup
- App closes unexpectedly while driving
- Crashes at speeds over 100 km/h
- Crashes when used with Apple Navigation simultaneously
- Speed display inaccuracy (showing 30% less)
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- Speed indicator jumps/moves erratically
- GPS signal not detected despite working in other apps
- Fails to launch after initial use
- Speed limit display shows incorrect values (e.g., 50 km/h on highways)
Requested features
8 requests- Paid ad-free version option
- Improved alarm/notification system
- GPS signal troubleshooting
- Altitude display in metric units
- Settings customization panel
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- Temperature display in Celsius
- HUD mode improvements for daytime visibility
- More noticeable alarm alerts
Optics Workbench
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Speedometer ٞ
No in-app purchases
Optics Workbench
No in-app purchases
Questions
Is Speedometer ٞ free?
Is Optics Workbench free?
Do Speedometer ٞ or Optics Workbench have ads?
Other comparisons
