Comparison

Geneva Moon vs Build24

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

Head to head
About

Geneva Moon

This app offers an astronomically accurate moon display for your Apple Watch. It provides a visually pleasing indication of the moon's current phase and orientation, matching what you see in the sky. You can also explore future moon phases by rotating the digital crown.

Highlights
  • Astronomically accurate moon display
  • Visually rich or simplified appearance options
  • Main display shows azimuth, elevation, phase, and orientation
  • Time travel through moon phases
  • Compass integration for moon location (Series 5+)
  • Complications for all watch face types
Features
Read full description

I've always liked wearing a lunar complication on my Apple Watch. There is something both visually delightful but yet also slightly geeky about it. But I was unable to find a complication that provided an astronomically accurate moon display...which just kinda bothered me. So I made Geneva Moon. Geneva Moon seeks to provide a highly accurate, visually pleasing indication of what the moon looks like right now, right where you are. My goal was to make it so that if you look down at your wrist and then up into the sky the images you see should match. It includes a robust set of complications for every watch face type.   Choose between either a visually rich 'actual ' appearance or a more simplified version, to fit your own personal style. The main display indicates the current azimuth and elevation of the moon along the horizon along with a visual indication of its phase and orientation. Rotate the Digital Crown to shift forward and backwards through time and see how the moon will shift (tap on the screen to reset to now) On Apple Watches equipped with a compass (Series 5) you can have Geneva Moon orient itself towards the actual moon to make it easier to locate the moon in the sky. Thank you for considering Geneva Moon, I hope you enjoy having the moon on your wrist as much I do. —Dave

About

Build24

This app offers 41 construction calculators for estimating materials, checking dimensions, and converting measurements. It includes tools for concrete, framing, roofing, and more, supporting both imperial and metric units. Users can export reports and save frequently used calculators.

Highlights
  • 41 construction calculators
  • Material estimation
  • Dimension checking
  • Measurement conversion
  • Imperial and metric units
  • PDF report export
  • Favorites for quick access
Read full description

Build24 brings 41 construction calculators together for contractors, carpenters and home projects. Estimate materials, check dimensions and convert measurements from one app. Find tools for concrete slabs, footings and post holes; framing stud counts, stairs and decking; roofing area and pitch; brick, block, gravel and soil; drywall, tile and paint. Measurement tools cover feet and inches, fractions, area, volume and unit conversion. Choose imperial or metric units where supported. Use search and Favorites to get back to the calculators you use most. Export and share PDF reports with the calculator name, date, inputs and results. Privacy Policy: https://prismandforge.com/apps/build24/legal/privacy_policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Build244 screens

Verdict

The call

The clearest difference is in-app purchases: Geneva Moon at none against Build24's 2. Geneva Moon also leads on update cadence (every 2 days vs every 4 weeks) and device support (3 vs 1). On price and ads 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. Build24 sells 2 in-app purchases, starting at $29.99 per year. Geneva Moon asks for nothing beyond the download.

UpkeepUpdate frequency

Geneva Moon ships an update every 2 days, Build24 every 4 weeks. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
Geneva Moon versus Build24: the parameters behind the verdict, then further details
ParameterGeneva MoonBuild24
PriceFreeFree
Rating3.7 (97 ratings) — better—
Positive reviews49.4% of reviews—
Number of ratings97 — better—
Update frequencyEvery 2 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better18.6
Further details — not scored
Size3 MB22 MB
Age rating4+4+
DeveloperCross Forward Consulting, LLCYerlan Kussainov

In-app purchases

None

Geneva Moon

No in-app purchases

2 purchases

Build24

Subscriptions1
  • Build24 Premium Yearly7 Days trial$29.991 Year
One-time1
  • Lifetime Premium$39.99

Questions

Is Geneva Moon free?
Geneva Moon is free to download, with no in-app purchases.
Is Build24 free?
Build24 is free to download, with in-app purchases available.
Do Geneva Moon or Build24 have ads?
Neither Geneva Moon nor Build24 shows ads.
Which is updated more often, Geneva Moon or Build24?
Geneva Moon ships an update every 2 days, and Build24 every 4 weeks. Most recently, Geneva Moon was updated on November 3, 2026 and Build24 on November 6, 2026.

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