Comparison

Speed Limit Camera vs Themis Black Box

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Speed Limit Camera

This app detects European speed limits using your phone's camera and map data. It displays your current speed and the limit, providing warnings if you exceed it. Features include CarPlay support and advanced road sign recognition.

Highlights
  • Real-time speed limit detection
  • Camera-based road sign recognition
  • Map-based speed limit data
  • CarPlay support
  • Speeding warnings
  • GPS speedometer
Features
Read full description

Traffic Sign Camera helps you see your current speed and the detected speed limit at a glance while you drive. It combines live camera recognition with map-based speed-limit lookup from OpenStreetMap, then shows the result in a clear driving display with a GPS speedometer. ► Top Features • Live camera-based recognition of European speed limit signs. • OpenStreetMap speed-limit lookup for roads, city areas, zones, and places where physical signs may be missing. • Smart merging of camera and map sources into one overall speed-limit display. • GPS speedometer with color feedback when you approach or exceed the current limit. • Sound alerts for newly detected signs and overspeed warnings. • CarPlay support for viewing speed and limit information on your dashboard. • Configurable km/h or mph units, speed tolerance, warning threshold, camera mode, and map query interval. • Ultra wide camera support on compatible iPhones for a broader view of roadside signs. ► How It Works Traffic Sign Camera watches the road ahead with your iPhone camera, finds possible speed-limit signs with on-device machine learning, and reads the sign value with Vision text recognition. At the same time, it can use your current location and course to request map-based speed-limit data. The app combines both sources so you can keep your eyes on one simple limit display. ► Important Limitations Traffic Sign Camera is a driver assistance tool, not a replacement for your attention or local traffic law. • Optimized for European speed limit signs. US speed limits are not currently supported. • Poor lighting, bad weather, dirty windows, unusual signs, or narrow curves can reduce camera recognition quality. • The app does not currently detect every end-of-limit, town boundary, or special-case road rule. • Map data depends on OpenStreetMap coverage and an internet connection. • Missed or incorrect detections can occur. Always follow posted signs and local rules. ► Notes from the Developer If you like Traffic Sign Camera, a rating helps a lot. For suggestions or support, please contact us by email from inside the app. ► Disclaimer The author assumes no liability for any damages occurring in connection with this app. Use is entirely at your own risk. By using the app, you accept the complete exclusion of liability and compensation claims. ► Important Notes Concerning Subscriptions All above subscriptions renew within 24 hours before the current period ends, and you will be charged through your iTunes account. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription. Manage or cancel your subscription from iTunes Account settings. See our Terms & Conditions (https://ibn-software.com/app-terms-conditions) and Privacy Policy (https://ibn-software.com/app-privacy-policy).

About

Themis Black Box

This app transforms your smartphone into a high-quality dashcam, offering advanced recording features like 4K resolution, HDR, and image stabilization. It includes a built-in speedometer, GPS logging, and watermarking for speed and location data, with easy file management and sharing options.

Highlights
  • 4K, 1080p, 720p recording resolutions
  • UltraWide, Wide, Tele camera support
  • HDR and OIS recording
  • Built-in speedometer and level
  • GPS location and speed watermarking
  • Easy file management and sharing
  • Camera direction switching
Read full description

Thank you for visiting Themis Black Box app. * It is *** STRONGLY RECOMMENDED *** to use with a COOLER for smartphones for the following reasons. - Due to the nature of the app that processes the video in real time, the device will overheat quickly. - Smartphones will be installed and used in harsh environments such as car dashboards. In addition, to reduce the effect of car vibration, it is recommended to use a cradle that adsorbs to the windshield. * Features of Themis - Supports 4K, 1080p, 720p recording resolutions and various FPS. - Supports UltraWide, Wide, Tele cameras. - Supports HDR (High Dynamic Range) recording. - Supports OIS (Optical Image Stabilization). - Provides clear recorded video frames even when driving in tunnels or at night. *** However, the smartphone's autofocus feature may malfunction on roads or in locations that are too dark, or if there are foreign substances (e.g., smudges, rainwater, etc.) on the windshield. - Built-in speedometer. - Built-in level to help horizontally align the camera. - Various information such as date, time, speed and address are added as a watermark at the top of the recorded video. - Supports search for location where video recording started by linking with Apple Maps and Google Maps. (However, if the region is set to Korea or the language is set to Korean, KakaoMap and NAVER Map are also supported.) - Easily switch camera direction to inside or outside the car with a long tap on the screen. - Supports starting and stopping recording using volume buttons or Bluetooth shutter. - Supports a red mark on the recorded video and the file in the Recorded File Browser screen by double-tapping the screen during video recording so that users can easily find the event they want to remember. - Supports displaying a yellow mark on the recorded file the user wants on the Recorded File Browser screen. - Supports user-marked recorded files protection function. - Supports various screensaver modes. - Various device protection functions. - Supports AirDrop file transfer. - Supports transferring multiple files using data cable and Finder on Mac or iTunes on PC. - Supports Worldwide address. - Supports easy call function. *** However, calls using speakers are currently not supported, and recording is stopped during calls. For FAQs, please refer to the URL below. https://bit.ly/ThemisFAQen Please drive safely with Themis Black Box. * In the sample images of the recorded video included in the app screenshot, part of the license plate has been blurred to protect privacy.

Screenshots

Speed Limit Camera2 screens
Themis Black Box4 screens

Verdict

The call

The clearest difference is in-app purchases: Themis Black Box at none against Speed Limit Camera's 4. Themis Black Box also leads on review sentiment (61% vs 32%) and update cadence (every 5 weeks vs every 3 months). Speed Limit Camera's advantage is ads (none vs shown). On price, monetization model, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Speed Limit Camera sells 4 in-app purchases, starting at $3.99 per 7 days. Themis Black Box asks for nothing beyond the download.

UpkeepUpdate frequency

Speed Limit Camera ships an update every 3 months, Themis Black Box every 5 weeks. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

Scorecard4 real differences · 6 level
Speed Limit Camera versus Themis Black Box: the parameters behind the verdict, then further details
ParameterSpeed Limit CameraThemis Black Box
PriceFreeFree
Rating4.6 (531 ratings) — better—
Positive reviews32.4% of reviews60.7% of reviews — better
Number of ratings531 — better—
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.016.0 — better
Further details — not scored
Size24 MB8 MB
Age rating4+4+
DeveloperIBN Software GmbHYeontack Jeong

Customer experience

Speed Limit Camera

All ratings530 ratings
Positive88.7%
Neutral3.0%
Negative8.3%
Written reviews142 reviews
Positive32.4%
Neutral14.8%
Negative52.8%

Themis Black Box

Written reviews28 reviews
Positive60.7%
Neutral14.3%
Negative25.0%

Bugs and requests

Speed Limit Camera

Reported bugs

3 issues
  • Incorrect speed limit display
  • Inconsistent sign recognition
  • Camera focus issues

Requested features

4 requests
  • Ability to manually set speed limits
  • Support for more road sign types (e.g. entry/exit, temporary)
  • Improved sign detection in low light/poor conditions
  • Background mode/integration with navigation apps

Themis Black Box

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Speed Limit Camera

Subscriptions3
  • Limits Pro weekly3 Days trial$3.997 Days
  • Limits Pro monthly$7.991 Month
  • Limits Pro yearly$12.991 Year
One-time1
  • Limits Pro (One time purchase)$24.99
None

Themis Black Box

No in-app purchases

Questions

Is Speed Limit Camera free?
Speed Limit Camera is free to download, with in-app purchases available.
Is Themis Black Box free?
Themis Black Box is free to download, with no in-app purchases.
Do Speed Limit Camera or Themis Black Box have ads?
Themis Black Box shows ads; Speed Limit Camera does not.
Which is updated more often, Speed Limit Camera or Themis Black Box?
Speed Limit Camera ships an update every 3 months, and Themis Black Box every 5 weeks. Most recently, Speed Limit Camera was updated on October 21, 2026 and Themis Black Box on October 19, 2026.

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