Zen Egg vs Rail Defence
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Zen Egg
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Relax and use your inner Zen powers. Find balance and harmony with the egg and win the game. Mastering this game gives you instant gratification! Instructions: Balance the egg on the finger using your device’s gyroscope and accelerometer. Find out how well-developed your sense of balance is. Note: Concentrate on the egg, not on the finger. Doing less is the key!
Rail Defence
Defend your castle from waves of enemies by strategically placing and upgrading weapons on a circular railway. Utilize special powers and enhanced armaments to repel increasingly formidable foes and protect your stronghold.
- Circular railway defense
- Acquire new weapons
- Upgrade weapons
- Strengthen defenses
- Special powers
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Defend your castle on a circular railway. Acquire new weapons as you gain experience. Strengthen your weapons and keep increasingly larger enemies away from your castle. Strengthen your defences by using special powers and weapons.
Screenshots
Verdict
The clearest difference is in-app purchases: Zen Egg at none against Rail Defence's 18. Rail Defence's advantage is update cadence (fortnightly vs every 2 months) and iOS requirement (13.0 vs 18.6). On price, ads and device support 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. Rail Defence sells 18 one-off in-app purchases. Zen Egg asks for nothing beyond the download.
Zen Egg ships an update every 2 months, Rail Defence fortnightly. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.
| Parameter | Zen Egg | Rail Defence |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.1 (1.1K ratings) — better |
| Positive reviews | — | 1.7% of reviews |
| Number of ratings | — | 1.1K — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 156 MB |
| Age rating | 4+ | 4+ |
| Developer | Animist OU | Upperpik Oyun Yazilim ve Pazarlama Ticaret Anonim Sirketi |
Bugs and requests
Zen Egg
Not enough reviews yet to summarise bugs or requests.
Rail Defence
Reported bugs
3 issues- The bomb does not work after a few seconds
- Randomly the weapons won't work
- The crossbow stops working after a while
Requested features
3 requests- More levels
- Different zombies
- More upgrades
In-app purchases
Zen Egg
No in-app purchases
Rail Defence
- Cash kickstart pack$1.99
- 10 Tickets$1.99
- Manager$2.99
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- Money Fountain Pack$2.99
- Engineer$2.99
- 20 Tickets$2.99
- Big Deal Pack$3.99
- Financier$3.99
- Royal Treasury Pack$4.99
- 50 Tickets$4.99
- No Ads$4.99
- Bundle$5.99
- Treasury Trove Pack$5.99
- 30 Tickets and No Ads$5.99
- Mega Bundle$7.99
- Big Vault Pack$8.99
- Ultra Bundle$10.99
- Big Chest Treasure$11.99
Questions
Is Zen Egg free?
Is Rail Defence free?
Do Zen Egg or Rail Defence have ads?
Which is updated more often, Zen Egg or Rail Defence?
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