Spermy vs Build Up!!
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Spermy
Navigate a challenging obstacle course by tapping to steer your sperm cell forward. Avoid touching the walls to survive and aim for objectives to boost your score. Compete for a high score and unlock achievements.
- Tap to steer
- Avoid wall collisions
- Collect objectives for points
- High scores and leaderboard
- Unlock achievements
- Previous attempts as company
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You are one of the millions that made it! Can you make it far enough to make sure your name will continue living? Tap the screen to turn your spermcell, keep doing this so you will move forward. But don't lose control because if you do and touch the wall your change of life is over! Features - Small tutorial - 10 other sperms to keep you company (your previous attempts) - Highscores - Get the objectives (yellow balls) to get extra points - Leaderboard - Achievements
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!
Screenshots
Verdict
The clearest difference is review sentiment: Spermy at 90% against Build Up!!'s 34%. Spermy also leads on ads (none vs shown) and rating (4.7 vs 4.5). Build Up!!'s advantage is ratings volume (16K vs 339). On price, update cadence, 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. Spermy sells 1 one-off in-app purchase and Build Up!! sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Spermy holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Build Up!! has 16K ratings behind it against 339, so its average is the more settled of the two. Written reviews point the same way: 90% of Spermy's written reviews are positive against 34% of Build Up!!'s.
Spermy ships an update every 2 weeks, Build Up!! fortnightly. The most recent releases landed on September 19, 2026 and September 29, 2026 respectively.
| Parameter | Spermy | Build Up!! |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (339 ratings) — better | 4.5 (16K ratings) |
| Positive reviews | 90.2% of reviews — better | 34.3% of reviews |
| Number of ratings | 339 | 16K — better |
| Update frequency | Every 2 weeks — better | Fortnightly |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 88 MB | 266 MB |
| Age rating | 9+ | 12+ |
| Developer | Rene Zuidhof | Voodoo |
Customer experience
Spermy
Build Up!!
User reviews
Spermy
From 339 App Store ratingsWhat we love
- 🚀 Nostalgic and educational
- 👍 Addictive and fun gameplay
- 💡 Unique and creative concept
Room to improve
- 🐛 Occasional glitches and crashes
- 🔍 Difficult and challenging
- 🤔 Questionable content
Build Up!!
From 16K App Store ratingsWhat we love
- 👍 Simple and fun game
- 🚀 Runs well with no crashes
- 💰 Free to play
Room to improve
- 💸 Excessive ads
- 🐛 Impossible or buggy levels
- 🔁 Repetitive gameplay
Bugs and requests
Spermy
Reported bugs
2 issues- Unresponsive controls
- Compatibility issues with older devices
Requested features
3 requests- Add difficulty levels
- Implement multiplayer mode
- Introduce new game modes
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
In-app purchases
Spermy
- No ads$0.99
Build Up!!
- Remove Ads.$2.99
