Comparison

Voltline vs Geometry Tower Defense

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Voltline

Features
Read full description

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.

About

Geometry Tower Defense

Engage in a vibrant tower defense game where geometric shapes are your weapons and enemies. Strategically place and upgrade towers to defend twisting paths against waves of enemies. Enjoy fast-paced, colorful action with satisfying effects, perfect for both quick sessions and deep tactical play.

Highlights
  • Strategic tower defense gameplay
  • Shape-based enemies
  • Geometric battlefields
  • Tower placement and upgrades
  • Challenging waves
  • Quick play sessions
Features
Read full description

Geometry Tower Defense is a fast, colorful tower defense game where geometry is the battlefield. Build powerful geometric towers, defend twisting paths, and stop waves of shape-based enemies before they reach the end. Every level challenges you to think strategically: place your towers carefully, upgrade at the right time, and adapt as new enemy patterns push your defenses to the limit. With clean visuals, satisfying effects, and easy-to-understand strategy, [Game Name] is designed for quick sessions and deeper tactical play. Whether you are blocking triangles, blasting cubes, or surviving a full geometric rush, every wave brings a new puzzle to solve. Features: • Strategic tower defense gameplay • Shape-based enemies and geometric battlefields • Fast, readable action with colorful effects • Tower placement and upgrade decisions • Increasingly challenging waves • Simple to learn, satisfying to master • Great for quick play sessions Defend the path. Upgrade your towers. Outsmart the shapes. Download Geometry Tower Defense and start building your geometric defense.

Screenshots

Voltline4 screens
Geometry Tower Defense4 screens

Verdict

The call

Voltline and Geometry Tower Defense are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Voltline sells 1 one-off in-app purchase and Geometry Tower Defense sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Voltline versus Geometry Tower Defense: the parameters behind the verdict, then further details
ParameterVoltlineGeometry Tower Defense
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 weeks—
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size13 MB10 MB
Age rating9+4+
DeveloperOlof PettersonJake Elrod

In-app purchases

1 purchases

Voltline

One-time1
  • Voltline PRO$2.99
1 purchases

Geometry Tower Defense

One-time1
  • Remove Ads$1.99

Questions

Is Voltline free?
Voltline is free to download, with in-app purchases available.
Is Geometry Tower Defense free?
Geometry Tower Defense is free to download, with in-app purchases available.
Do Voltline or Geometry Tower Defense have ads?
Neither Voltline nor Geometry Tower Defense shows ads.

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