Voltline vs Void_TD
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Voltline
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Build a neon defense that works together. Place six tower types, combine their strengths, and adapt as enemy waves push through the grid. Try five campaign levels free, then unlock the full campaign with one purchase. FAIR PRICING Try the first 5 levels free. One single purchase unlocks all 30 levels, boss fights, and every future update — forever. No subscriptions, no consumables, no ads. Roguelite, survival, and weekly challenges are free for everyone. Core gameplay runs fully offline; a connection is only needed for the one-time purchase, Game Center, and iCloud sync. 30 CAMPAIGN LEVELS x 3 DIFFICULTIES Battle through 30 handcrafted levels across 3 acts. Play on Normal, Hard, or Insane - each difficulty scales enemy HP, speed, and your starting economy. Earn up to 3 stars per level and accumulate Voltage to unlock tower tiers, abilities, modes, and color schemes. Every level is hand-designed with unique grid layouts, enemy compositions, and strategic chokepoints. EPIC BOSS ENCOUNTERS Face the boss on late-game levels as it cycles through vulnerable and shielded phases - the same relentless standoff every time, demanding sharp timing and the right tower placement to break through. One wrong move and the grid falls. ROGUELITE, SURVIVAL & DAILY CHALLENGES Start a roguelite run with EMP and one random tower, then draft your next tower every 3 waves from a curated selection of three choices. Every 5 waves the map rotates and a modifier shakes up your approach, so no two runs play the same. Endless survival mode tests your endurance against infinite escalating waves. Daily and weekly challenges set the same fixed level, difficulty, and modifier for everyone - compete on Game Center leaderboards. TOWER SYNERGIES & ACTIVE ABILITIES Six tower types - Laser, EMP, Firewall, Tracer, Grid, Pulse - each with 3 upgrade tiers and branching specializations. Pair adjacent towers to trigger five synergies: Cryo-Burn, Ionized Grid, Suppression Field, Overcharged Lattice, and Kinetic Relay. Command the battlefield with deployable abilities that charge as you fight: Slow Field slows every enemy on the grid for a few seconds, buying you time to reposition and chain your towers' synergies. BUILT FOR ACCESSIBILITY Colorblind mode adds geometric symbols on every tower and pattern-fill HP bars, not just color. Reduced Motion simplifies animations, and a Flashing Effects toggle turns off strobing and flash-based effects for photosensitivity. Larger Text offers three text sizes, up to 1.5x standard. VoiceOver support covers menus, HUD, and tower panels, plus a board overlay that reads out every grid cell so you can place and select towers by touch.
Void_TD
Defend your base against waves of enemies in this sci-fi tower defense game. Strategically place and upgrade towers, customize your loadout, and face increasingly difficult challenges. Unlock new modes and cosmetic options as you progress.
- 6 unique tower types with 3 upgrade levels
- 6 enemy types including boss variants
- 20 campaign waves and procedural endless mode
- Customizable tower loadouts and cosmetic skins
- 3 difficulty levels
- High score tracking
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Void_TD is a sci-fi tower defense game where you defend your base against waves of void-spawned enemies. Place towers on the grid, upgrade your defenses, and outlast 20 increasingly dangerous waves — culminating in a showdown with THE VOID, the ultimate boss. TOWERS Choose from 6 unique tower types and build your perfect loadout: - Laser Turret — fast-firing single-target beam - Plasma Cannon — area-of-effect splash damage - Void-Seeker — long-range precision strikes - Titan Mech — devastating heavy splash damage - Void Stunner — slows groups of enemies and weakens bosses - Tesla Tower — electric AoE with burn and stun upgrades Upgrade each tower up to level 3 for increased damage and range. Sell towers mid-wave to adapt your strategy on the fly. ENEMIES Face off against 6 enemy types, each with distinct abilities: - Scouts and Shades test your reaction speed - Tankers and Sentinels absorb punishment with raw HP and periodic shields - Heralds stun your towers as they pass - THE VOID enters with heavy armor that must be broken before you can finish it off Enemy strength scales with each wave — no two runs feel the same. THREE DIFFICULTY LEVELS - Normal — learn the ropes and master your strategy - Hard — 1.5x enemy HP, unlocked after beating the campaign - Insane — 2.5x HP and faster enemies, for those who want a real challenge ENDLESS MODE Beat the campaign to unlock Endless Mode, where waves are procedurally generated with exponential scaling. There is no final wave — just you, your towers, and the void. Compete against your own high score. CUSTOMIZE YOUR LOADOUT Equip up to 5 towers before each run. Earn coins from victories to unlock the Tesla Tower, buy cosmetic skins, and customize your towers with 9 color tints. Redeem codes for exclusive rewards. FEATURES - 20 hand-crafted campaign waves plus procedural endless mode - 6 tower types with 3 upgrade levels each - 6 enemy types including 2 boss variants - Tower loadout and cosmetic customization - Base upgrades for damage reduction - High score tracking - Haptic feedback - No ads. No pay-to-win. Just tower defense.
Screenshots
Verdict
The clearest difference is in-app purchases: Void_TD at none against Voltline's 1. Void_TD also leads on iOS requirement (12.0 vs 17.0). On price, update cadence, 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. Voltline sells 1 one-off in-app purchase. Void_TD asks for nothing beyond the download.
Voltline ships an update every 4 weeks, Void_TD fortnightly. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.
| Parameter | Voltline | Void_TD |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (14 ratings) — better |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | — | 14 — better |
| Update frequency | Every 4 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 93 MB |
| Age rating | 9+ | 9+ |
| Developer | Olof Petterson | Ryan O'Donnell |
In-app purchases
Voltline
- Voltline PRO$2.99
Void_TD
No in-app purchases









