Bubbles TD vs Spire Bastion
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Bubbles TD
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Like Tower Defense? Give our game a try. The objective of the game is to install your weapons to prevent the bubbles travelling along the path from reaching the end. Use coins, earned by shooting bubbles, to buy new weapon and upgrade existing ones. Watch out against the BOSS bubble – it has multiple lives and shoots back at your weapons. Choose between different routes and different difficulty levels. Don't forget to check our Game section for other fun games...
Spire Bastion
Defend your Crystal Core from climbing enemies in this simple yet strategic tower defense game. Place heroes to auto-fight and utilize 3D terrain to your advantage. Enjoy a relaxing experience with light strategy and satisfying results.
- 3D terrain impacts gameplay
- Light strategy with skill combos
- Floor-by-floor progression
- Hero placement and auto-fighting
- Focus on calm decisions
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Spire Bastion is a fresh and simple tower defense that feels good to pick up and play. Enemies climb the spire toward your Crystal Core. You drag to place heroes and they auto-fight, so the focus stays on calm decisions and satisfying results. Features ● 3D terrain matters: geometry changes range, lines of fire, and chokepoints ● Light strategy: simple skill combos that feel smart without heavy micromanagement ● Floor-by-floor climb: each layout offers a small twist and a new idea to try Play at your own pace, let the map guide your plan, and protect the Crystal Core. Drop in, relax, and enjoy the climb.
Screenshots
Verdict
The clearest difference is update cadence: Spire Bastion at fortnightly against Bubbles TD's every 17 months. Bubbles TD's advantage is iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Bubbles TD ships an update every 17 months, Spire Bastion fortnightly. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.
| Parameter | Bubbles TD | Spire Bastion |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 17 months | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 14 MB | 359 MB |
| Age rating | 4+ | 12+ |
| Developer | GASP Mobile Games Inc | FutureBright Technology Company Limited |
In-app purchases
Bubbles TD
No in-app purchases
Spire Bastion
No in-app purchases
