Comparison

Bubble Level + Compass Pro vs Nineteen Days Watch

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 Pro

This utility app provides a precise spirit level and compass for your iPhone and Apple Watch. Get live readings on your wrist, even when your phone's screen is out of sight. Features include bullseye, horizontal, and vertical levels with 0.1-degree precision.

Highlights
  • Bullseye, horizontal, and vertical levels
  • 0.1-degree precision
  • True and magnetic heading
  • Apple Watch companion app
  • Gyro or accelerometer sensor mode
  • Red-light night mode
Features
Read full description

Bubble Level + Compass Pro combines a precise spirit level, compass, and Apple Watch companion app, so when your phone is placed somewhere hard to see its screen, you can still get live readings from your wrist. No more out-of-reach setups, and no more crouching. Features: • Bullseye level plus horizontal and vertical levels with 0.1 degree precision • Bubble level units: Angle (degrees) or Incline/Slope (%) • True and magnetic heading with direction text • Magnetic declination • Apple Watch companion app • Gyro or accelerometer sensor mode • Gyro calibration offset to compensate for camera bulge or uneven phone cases • Pitch/Roll/Yaw rotation rate readouts • Compass calibration status • Red-light night mode The tool is normally included in my astronomical app (Polar Scope Align Pro), but I decided to release it as a separate app because I could not find anything with the features I wanted on the app store. (A free ad-supported version is also available)

About

Nineteen Days Watch

Track Bahá'í dates and Holy Days directly on your Apple Watch. This app provides seamless date conversion and integration into your daily life, keeping you connected to significant events in the Bahá'í Faith.

Highlights
  • Bahá'í date conversion
  • User-friendly design
  • Seamless Apple Watch integration
  • Continuous calendar updates
  • Track Holy Days
Features
Read full description

Elevate your Apple Watch experience with the Badi Calendar – your essential companion for tracking Bahá'í dates and Holy Days. Developed by Nineteen Days, this beautifully crafted app brings the Bahá'í Faith to your wrist, making it easier than ever to stay connected to the Bahá'í calendar and its significant events. Key Features: Bahá'í Date Conversion: Say goodbye to manually converting Gregorian dates to the Bahá'í calendar. Our app seamlessly converts dates, ensuring you don't miss a significant Bahá'í event. User-Friendly Design: Our app is designed with the utmost attention to usability and aesthetics, ensuring an enjoyable and meaningful user experience. Seamless Integration: The app seamlessly integrates with your Apple Watch, making it easy to incorporate your faith into your daily life. Continuous Updates: We're committed to keeping our app up to date with the latest Bahá'í calendar changes, ensuring that you are always informed. Stay connected to the Faith and the Bahá'í calendar like never before. Install the Badi Calendar for Apple Watch today and take your spiritual journey to new heights. Note: The Badi Calendar app is not affiliated with or endorsed by the Bahá'í World Centre. It is an independent product created by Nineteen Days for the convenience of Bahá'ís worldwide. About Badi Calendar: The Badi calendar, adopted by the Baháʼí Faith, is a solar calendar composed of nineteen months and four or five intercalary days. The beginning of the year occurs at the equinox in spring. Each month has its name representing a virtue (e.g., Perfection, Mercy), as do the days of the week. This calendar was initiated in 1844 when the Báb began to spread His teachings.

Screenshots

Bubble Level + Compass Pro4 screens
Nineteen Days Watch3 screens

Verdict

The call

The clearest difference is update cadence: Nineteen Days Watch at every 2 weeks against Bubble Level + Compass Pro's every 17 months. Bubble Level + Compass Pro's advantage is price ($0.99 vs $4.99) and iOS requirement (12.0 vs 16.4). On review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Bubble Level + Compass Pro costs $0.99 and Nineteen Days Watch $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Bubble Level + Compass Pro ships an update every 17 months, Nineteen Days Watch every 2 weeks. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
Bubble Level + Compass Pro versus Nineteen Days Watch: the parameters behind the verdict, then further details
ParameterBubble Level + Compass ProNineteen Days Watch
Price$0.99 — better$4.99
Rating5.0 (22 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings22 — better—
Update frequencyEvery 17 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS12.0 — better16.4
Further details — not scored
Size7 MB1 MB
Age rating4+4+
DeveloperDimitrios KechagiasNineteen Days,LLC

Customer experience

Bubble Level + Compass Pro

All ratings22 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Nineteen Days Watch

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Bubble Level + Compass Pro

No in-app purchases

None

Nineteen Days Watch

No in-app purchases

Questions

Is Bubble Level + Compass Pro free?
Bubble Level + Compass Pro costs $0.99, with no in-app purchases.
Is Nineteen Days Watch free?
Nineteen Days Watch costs $4.99, with no in-app purchases.
Do Bubble Level + Compass Pro or Nineteen Days Watch have ads?
Neither Bubble Level + Compass Pro nor Nineteen Days Watch shows ads.
Which is updated more often, Bubble Level + Compass Pro or Nineteen Days Watch?
Bubble Level + Compass Pro ships an update every 17 months, and Nineteen Days Watch every 2 weeks. Most recently, Bubble Level + Compass Pro was updated on October 24, 2026 and Nineteen Days Watch on October 8, 2026.

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