Bubble Level + Compass vs NagTag
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Horizontal and vertical level measurements
- Surface angle readings
- True north compass
- Advanced calibration
- Magnetic declination reading
- Accelerometer/Gyro switch
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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.
NagTag
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Create a reminder in a fraction of a second: Snap a pic and we’ll pop up a notification every half hour to make sure you don't forget. Perfect if you've left something on the stove or need to remember to let the dog back in. How does it work? 1. Snap a pic of what you need to remember 2. Get a notification every half hour for the next ten hours to make sure you don't forget it 3. Dismiss the nag notification when you're done
Screenshots
Verdict
The clearest difference is ads: NagTag at none against Bubble Level + Compass's shown. Bubble Level + Compass's advantage is update cadence (every 4 months vs every 19 months). On price, in-app purchases, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Bubble Level + Compass ships an update every 4 months, NagTag every 19 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.
| Parameter | Bubble Level + Compass | NagTag |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (35 ratings) — better | — |
| Positive reviews | 90.5% of reviews | — |
| Number of ratings | 35 — better | — |
| Update frequency | Every 4 months — better | Every 19 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 18 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Dimitrios Kechagias | KOALABRAIN LTD |
In-app purchases
Bubble Level + Compass
No in-app purchases
NagTag
No in-app purchases
Questions
Is Bubble Level + Compass free?
Is NagTag free?
Do Bubble Level + Compass or NagTag have ads?
Which is updated more often, Bubble Level + Compass or NagTag?
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