# Decoherence Game vs Letter Launch

The clearest difference is price: Decoherence Game at Free against Letter Launch's $0.99. Decoherence Game also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (13.0 vs 15.0). Letter Launch's advantage is review sentiment (90% vs 60%) and chart position (#165 vs unranked). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Decoherence Game is free to download; Letter Launch costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.1 for Decoherence Game against 4.0 for Letter Launch. Both are backed by a comparable volume of ratings — 11 and 4 respectively. Written reviews are what separate them: 60% of Decoherence Game's written reviews are positive against 90% of Letter Launch's.

Decoherence Game ships an update every 9 days, Letter Launch every 3 weeks. The most recent releases landed on September 6, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Decoherence Game | Letter Launch |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.1 (11 ratings)](https://appshunter.io/ios/app/decoherence-game/id6473932255/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/letter-launch/id6474981641/reviews) |
| Number of ratings | **11** | 4 |
| Positive reviews | 60.0% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#165** |
| Size | 2.7 GB | 273 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 9+ |
| Developer | [Efecto Estudios S.A.S](https://appshunter.io/developer/531360665) | [Nat Russell](https://appshunter.io/developer/1129535492) |

## What reviewers say

### Decoherence Game

[App page](https://appshunter.io/ios/app/decoherence-game/id6473932255)

Design and command customizable robots in tactical arena battles. Engage in thrilling PvP matches or challenge yourself in a single-player campaign. Adapt your strategy on the fly in unpredictable arenas.

**Highlights:** Robot customization, Strategic command assignment, Pilot control during battles, PvP matches, Single-player campaign, Dynamic arenas

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Letter Launch

[App page](https://appshunter.io/ios/app/letter-launch/id6474981641)

**Currently charting:** #165 Top Paid · Word (US App Store)

A unique platformer and word-guessing game for mobile and tablet. Fling yourself through vibrant worlds, utilizing physics-based mechanics and collecting abilities to overcome challenges and defeat robotic foes. Experience classic and action-packed gameplay modes.

**Highlights:** Physics-based platforming, Word guessing mechanics, Unlockable abilities, Unique stage mechanics, Boss battles, Challenge levels, Classic and Action game modes

**In-app purchases:** none


## Frequently asked questions

### Is Decoherence Game free?

Decoherence Game is free to download, with no in-app purchases.

### Is Letter Launch free?

Letter Launch costs $0.99, with no in-app purchases.

### Which has better reviews, Decoherence Game or Letter Launch?

Decoherence Game is rated higher. Decoherence Game averages 4.1 out of 5 from 11 ratings, while Letter Launch averages 4.0 from 4 ratings.

### Do Decoherence Game or Letter Launch have ads?

Neither Decoherence Game nor Letter Launch shows ads.

### Which is updated more often, Decoherence Game or Letter Launch?

Decoherence Game ships an update every 9 days, and Letter Launch every 3 weeks. Most recently, Decoherence Game was updated on September 6, 2026 and Letter Launch on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*