Build Up!! vs Crowded Sky
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Build Up!!
Construct your tower as tall as possible by strategically placing building nodes. Collect more nodes as you ascend to reach crucial checkpoints and achieve new heights.
- Build structures high
- Gather building nodes
- Reach checkpoints
- Ascend to new heights
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Build your structure as high as you can! Gather additional building nodes along the way and reach the checkpoints!
Crowded Sky
Pilot a spaceship using your phone's motion sensors in this arcade-style space combat game. Engage in campaign missions, endless survival modes, and time trials. Customize your ship and weapons for an immersive experience.
- Tilt-to-steer controls
- 27 campaign missions
- Infinite survival mode
- 24 slalom time trials
- Customizable ship loadouts
- Four difficulty settings
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Your phone is the cockpit. Or, rather, the steering apparatus. Accelerate by tilting. Tilt to strafe. Twist to steer. Tap or hold for the pew pew! The year is two-thousand and three-thousand and ... look, it's the future. Humanity is threatened by some bug-like things? Bug are good bad guys right? Look, they have ships that are various shades of red and quite threatening in shape, and they shot us first probably. Stop asking questions and fire those torpedoes! THE CAMPAIGN Twenty-seven missions across five sectors. Battle waves of enemy fighters, escort civilian convoys, and fight alongside allied fighters and capital ships in massive engagements. Four difficulty settings for all levels of player. INFINITE MODE Wave after wave, at five difficulty settings: from toddler to ace. SLALOM Twenty-four courses against the clock, loops, spirals, hairpins, and channels barely wider than your hull. YOUR SHIP, YOUR GUNS Thirteen hulls, each with its own combination of hardpoints, and ordnance tubes. Customize your loadout with an array of lasers, cannons, torpedoes, mines, flak, and tractor beams. Trade power between shields, guns, and engines mid-fight. FREE TO START The tutorial, the first sector of the campaign, six slalom courses, and Infinite Mode are free. Optional packs open the rest of the campaign and the full course list. No ads. No accounts. No internet needed. Nothing to sign up for. Requires a device with an accelerometer - the controls read the device's motion sensors - iPhone supported, iPad maybe soon.
Screenshots
Verdict
The clearest difference is ads: Crowded Sky at none against Build Up!!'s shown. Crowded Sky also leads on rating (5.0 vs 4.5) and update cadence (every 2 days vs fortnightly). Build Up!!'s advantage is ratings volume (16K vs 1) and device support (3 vs 1). On price, 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
Both are free to download. Build Up!! sells 1 one-off in-app purchase and Crowded Sky sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Crowded Sky holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Build Up!! has 16K ratings behind it against 1, so its average is the more settled of the two.
Build Up!! ships an update fortnightly, Crowded Sky every 2 days. The most recent releases landed on November 3, 2026 and October 13, 2026 respectively.
| Parameter | Build Up!! | Crowded Sky |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (16K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 34.1% of reviews | — |
| Number of ratings | 16K — better | 1 |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 266 MB | 8 MB |
| Age rating | 12+ | 12+ |
| Developer | Voodoo | Scout Corps |
Customer experience
Build Up!!
Crowded Sky
Bugs and requests
Build Up!!
Reported bugs
3 issues- Rivet counter malfunction
- Levels regenerating incorrectly
- Tower physics issues
Requested features
3 requests- More level variety
- Ability to create custom maps
- Removal of perfect triangle requirement
Crowded Sky
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Build Up!!
- Remove Ads.$2.99
Crowded Sky
- Weapons Pack$1.99
- All Slalom Courses$1.99
- Campaign Act II$2.99
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- Campaign Act III$2.99
- Campaign & Slalom Bundle$6.99









