Comparison

Bubble Level + Compass vs Robotics NLK

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

Head to head
About

Bubble Level + Compass

This utility app provides a precise bubble level for horizontal, vertical, and surface angle measurements, along with a true-north compass. It offers advanced calibration options and works on iOS devices. A Pro version is available for additional features.

Highlights
  • Horizontal and vertical level measurements
  • Surface angle readings
  • True north compass
  • Advanced calibration
  • Magnetic declination reading
  • Accelerometer/Gyro switch
Features
Read full description

Bubble Level + Compass combines a bubble level and a compass, with advanced controls for users who want more than the basics. Use it to check horizontal/vertical/surface angles, or get compass direction relative to either true or magnetic north. For users who work with physical compasses, magnetic declination is also provided to convert magnetic readings to true north readings. The level includes gyroscope calibration, which is especially useful on phones with a raised camera bump or an uneven back/case. No nagging popups or interruptions. The free version only includes a small banner ad at the bottom. Features • Bullseye level plus horizontal and vertical levels with 0.1 degree precision. • Compass with true north and magnetic north. • Magnetic declination display for converting magnetic readings to true north readings. • Gyroscope calibration for phones that do not rest perfectly flat. • Gyro or accelerometer sensor mode. • Clean interface with no popup interruptions. If you enjoy the app, leaving a review would help. An ad-free Pro version is also available, with more features including Apple Watch support, night mode, slope/inclination %, and pitch, yaw, and roll rotation rate.

About

Robotics NLK

Features
Read full description

Robotics NLK is an app letting you configure custom missions, relying on iPhone/iPad sensors. The goal is to get maximum out of your iOS device, with maximum flexibility and configurability. In the nearest future it will be possible to order BLE/WiFi accessories making your missions even more powerful, transforming your mobile device into a robot. ** Features ** * Synced Maps * - Compare Maps keeping them in Sync - while moving position on one map - synced maps will move as well. GEOINT tool. - Support for default maps as well as OpenStreetMap, OpenTopoMap - with caching mechanism - so that cached map tiles are operational offline. * Configurable Tabata Timer * - Super flexible Tabata Timer - with actions like pronouncing phrases, or vibrating. Configured as Nodes. - This lets you setup any custom workout with voice commands guidance. * GPS Track Recorder * - Record your GPS Track, Run Track, Hike Track. The GeoJSON is recorded. - Export or View the GeoJSON track over the Map. - Visualise the tracks as a beautiful FlyOver Video for sharing. * iCloud Baby Monitor / Security Camera * - Capture slideshow images on first device with your iCloud active. - Read slideshow images using another device with your iCloud active. Syncs approximately each 10 seconds. - Secure data transfer via your iCloud between your devices. No external servers get access to your data. * WiFi/BLE Baby Monitor / Security Camera * - Capture slideshow images on one device, which will broadcast it via your Local Network. - Receive slideshow images on another device in the same Local Network. Syncs approximately each second. - Secure data transfer via your Local Network between several RNLK app installations. * REST API cURL Calls * - Call any url at any event in the mission - by triggering a cURL.

Screenshots

Bubble Level + Compass3 screens
Robotics NLK4 screens

Verdict

The call

The clearest difference is in-app purchases: Bubble Level + Compass at none against Robotics NLK's 1. Bubble Level + Compass also leads on iOS requirement (12.0 vs 15). Robotics NLK's advantage is ads (none vs shown). On price, update cadence and device support 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. Robotics NLK sells 1 one-off in-app purchase. Bubble Level + Compass asks for nothing beyond the download.

UpkeepUpdate frequency

Bubble Level + Compass ships an update every 4 months, Robotics NLK every 2 months. The most recent releases landed on November 13, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
Bubble Level + Compass versus Robotics NLK: the parameters behind the verdict, then further details
ParameterBubble Level + CompassRobotics NLK
PriceFreeFree
Rating5.0 (35 ratings) — better—
Positive reviews90.5% of reviews—
Number of ratings35 — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15
Further details — not scored
Size18 MB372 MB
Age rating4+4+
DeveloperDimitrios KechagiasIevgen Naloiko

In-app purchases

None

Bubble Level + Compass

No in-app purchases

1 purchases

Robotics NLK

One-time1
  • Private Mode - No Event Logging$9.99

Questions

Is Bubble Level + Compass free?
Bubble Level + Compass is free to download, with no in-app purchases.
Is Robotics NLK free?
Robotics NLK is free to download, with in-app purchases available.
Do Bubble Level + Compass or Robotics NLK have ads?
Bubble Level + Compass shows ads; Robotics NLK does not.
Which is updated more often, Bubble Level + Compass or Robotics NLK?
Bubble Level + Compass ships an update every 4 months, and Robotics NLK every 2 months. Most recently, Bubble Level + Compass was updated on November 13, 2026 and Robotics NLK on November 8, 2026.

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