Geneva Moon vs Whack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
Whack
This game makes math practice engaging and challenging. As you tap numbers, the game speeds up, turning your math drills into an alert and focused experience. It's designed for those who enjoy a high-difficulty approach to learning.
- Engaging math practice
- Increasing difficulty
- Focus enhancement
- Game-like interface
- Quick reaction challenges
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Math can be hard, and staying focused on math can be even harder. Whack-A-Num exists to keep you awake and alert during hours of math practice. With every number tapped, the bubbles move faster. The calculator for people who play video games on Hard Mode.
Screenshots
Verdict
The clearest difference is review sentiment: Whack at 100% against Geneva Moon's 49%. Whack also leads on rating (5.0 vs 3.7) and monetization model (free vs paid). Geneva Moon's advantage is ratings volume (97 vs 2) and device support (3 vs 1). On price, update cadence, ads and in-app purchases 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.
Whack holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Geneva Moon has 97 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 49% of Geneva Moon's written reviews are positive against 100% of Whack's.
Geneva Moon ships an update every 2 days, Whack every 3 days. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | Geneva Moon | Whack |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (97 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 49.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 97 — better | 2 |
| Update frequency | Every 2 days — better | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 3 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Cross Forward Consulting, LLC | Danielle Lewis |
Customer experience
Geneva Moon
Whack
In-app purchases
Geneva Moon
No in-app purchases
Whack
No in-app purchases









