What's Up? vs Interesting Numbers
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
What's Up?
Discover celestial bodies visible in the night sky with this intuitive app. Easily track planets, the Sun, and Moon, and forecast their appearance. Access detailed information and moon phases, with support for the Southern Hemisphere.
- Simple sky grid display
- Effortless navigation
- Time-bar functionality
- Comprehensive celestial information
- Observation insights
- Moon phases
- Wikipedia links
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Whether you're deciding if it's worth setting up your telescope or simply curious about that bright 'star,' What's Up? is the perfect companion for sky enthusiasts. Key Features: • Simple Sky Grid Display: View the positions of the Sun, Moon, and planets on an intuitive grid representing the night sky. • Effortless Navigation: No augmented reality or motion tracking needed—just a straightforward display to see what's up. • Time-Bar Functionality: Slide the time-bar to forecast the appearance of your favorite planets and their directions. • Comprehensive Information: Displays the location of the Sun, Moon, planets, and even Pluto. • Observation Insights: Instantly identify which celestial objects are prime for observation. • Moon Phases: Stay updated with the current moon phase. • Wikipedia Links: Dive deeper with quick access to Wikipedia pages for detailed information. • Southern Hemisphere Support: Sky-watchers down south are covered too. • Minimal Network Usage: Only needed for Wikipedia access. • Note: Localizations are limited to planet names. For a full 3D rendered experience with motion tracking, check out our award-winning companion app, Pocket Universe. If you already own Pocket Universe, you'll find What's Up? familiar yet even more user-friendly, with a sleeker design and quicker access to the "Currently Visible" mode, and basic Apple Watch support.
Interesting Numbers
This educational game helps young children learn numbers through interactive activities. It features colorful graphics, cheerful music, and simple controls, with options to switch between English, Chinese, and Japanese languages. The app includes sections for reading, finding, and counting numbers within various ranges.
- Learn numbers up to 100
- Interactive counting activities
- Number pronunciation
- Multiple language support (English, Chinese, Japanese)
- Childlike graphics and music
- Themed sections (Easter, Ocean)
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Baby's math game Childlike Pictures, Cheerful Music, Simple Pperation Switch between English, Chinese and Japanese Section 1: Read Number within 10 or 100 Press the number button and learn how to pronounce Section 2: Find Number within 10 or 100 Easter theme Listen to the number and press the corresponding button Section 3: Count within 10 or 20 Ocean theme Press marine creatures, learn how to count with the help of voice, and then press the number buttons
Screenshots
Verdict
The clearest difference is rating: Interesting Numbers at 5.0 against What's Up?'s 4.2. Interesting Numbers also leads on review sentiment (100% vs 58%) and update cadence (monthly vs every 3 months). On price, ratings volume, 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.
Interesting Numbers holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 9 and 4 respectively. Written reviews point the same way: 58% of What's Up?'s written reviews are positive against 100% of Interesting Numbers's.
What's Up? ships an update every 3 months, Interesting Numbers monthly. The most recent releases landed on October 29, 2026 and October 3, 2026 respectively.
| Parameter | What's Up? | Interesting Numbers |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (9 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 57.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 — better | 4 |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 12.5 | 11.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 121 MB |
| Age rating | 4+ | 4+ |
| Developer | John Kennedy | Yan Xu |
Customer experience
What's Up?
Interesting Numbers
In-app purchases
What's Up?
No in-app purchases
Interesting Numbers
No in-app purchases
Questions
Is What's Up? free?
Is Interesting Numbers free?
Which has better reviews, What's Up? or Interesting Numbers?
Do What's Up? or Interesting Numbers have ads?
Which is updated more often, What's Up? or Interesting Numbers?
Other comparisons
