Comparison

GenEi AP vs Flat Machine

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

Head to head
About

GenEi AP

Embark on a musical quest through a mysterious world inspired by Harumakigohan's art and music. Help the protagonist find songs to please a friend, uncovering secrets behind doors and mysterious heartbeats.

Highlights
  • Explore Harumakigohan's artistic world
  • Quest for music and songs
  • Uncover mysteries and secrets
  • Inspired by Vocaloid music
  • Part of a cross-media trilogy
Features
Read full description

Travel through the world of Harumakigohan in a quest for music. ”What are you listening to, Mikage?” Spica is looking for something to listen to, and Mikage, the protagonist, goes on a journey in a mysterious world to search for songs that will please her friend. What’s behind that last door? What is that heartbeat you can hear? This game is set in a variety of locations inspired by the work of Vocaloid producers, illustrator, and animator Harumakigohan. If you already love songs like Meltyland Nightmare or Reunion, GenEi AP will be that much more special to you. This is the first work in a cross-media trilogy by Harumakigohan, which will include: - The game “GenEi AP: Empty Heart” - The music album “GenEi EP: Envy Phantom” - The concert “GenEi LV: Harumakigohan One-man Concert 2022”

About

Flat Machine

Control a limbless robot tasked with defending a settlement in a post-apocalyptic world. Engage in simple, timing-based battles against various threats and make choices that influence the game's multiple endings. Discover the mystery of your own identity.

Highlights
  • Simple, timing-based battles
  • Item combination system
  • Respond to various visitors
  • Multiple endings based on choices
  • Daily events and encounters
Features
Read full description

■ Story In the not-so-distant future, a world on the brink of ruin. Awakening in the wasteland is a single robot—with no limbs and no memories. You become the settlement's "gatekeeper," fending off the strange visitors who arrive day after day. Can you protect the settlement through its final days? And what is the true nature of the Flat Machine...? ■ Features [1] Easy, satisfying defense battles—just tap! Tap with the right timing to repel the enemies closing in. Simple to play, yet endlessly strategic through gear and item combinations. Build your own ultimate defense style. [2] Your "choices" change the future—multiple endings Not everyone at the gate is an enemy. Help a struggling mutant, or coldly turn it away? Your decisions steer the story to its ending in this rich sci-fi adventure. [3] Charming pixel art and a wistful apocalyptic world Lovable yet lonely characters brought to life in beautiful retro pixel art. An original atmosphere, deepened by a carefully crafted soundtrack. ■ Perfect for players who love - Pixel-art (retro) games - Dystopian, sci-fi, and apocalyptic worlds - Story-driven indie games - Quick, pick-up-and-play sessions - Tower defense, idle games, and RPGs - Playing free to the end, at your own pace, with no stamina Step into the "everyday apocalypse" woven by an amnesiac gatekeeper robot and the inhabitants of a dying world.

Screenshots

GenEi AP4 screens
Flat Machine4 screens

Verdict

The call

The clearest difference is in-app purchases: GenEi AP at none against Flat Machine's 4. GenEi AP also leads on ads (none vs shown) and iOS requirement (11.0 vs 15.0). Flat Machine's advantage is update cadence (every 5 days vs every 2 months). On price, rating, review sentiment and ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flat Machine sells 4 one-off in-app purchases. GenEi AP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for GenEi AP against 4.9 for Flat Machine. Both are backed by a comparable volume of ratings — 131 and 68 respectively. Written reviews split almost evenly too, at 93% and 94% positive.

UpkeepUpdate frequency

GenEi AP ships an update every 2 months, Flat Machine every 5 days. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

Scorecard5 real differences · 5 level
GenEi AP versus Flat Machine: the parameters behind the verdict, then further details
ParameterGenEi APFlat Machine
PriceFreeFree
Rating5.0 (131 ratings) — better4.9 (68 ratings)
Positive reviews92.9% of reviews93.7% of reviews — better
Number of ratings131 — better68
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size280 MB118 MB
Age rating4+12+
Developerroom6 LLC.zxima.LLC

Customer experience

GenEi AP

All ratings131 ratings
Positive99.2%
Neutral0.0%
Negative0.8%
Written reviews56 reviews
Positive92.9%
Neutral5.4%
Negative1.8%

Flat Machine

All ratings68 ratings
Positive97.1%
Neutral2.9%
Negative0.0%
Written reviews63 reviews
Positive93.7%
Neutral4.8%
Negative1.6%

User reviews

GenEi AP

From 131 App Store ratings

What we love

  • 💖 Beautiful pixel art
  • 🎶 Amazing music
  • 📖 Engaging story
  • 😌 Relaxing atmosphere
  • ✨ Emotional impact

Room to improve

  • ⏳ Story is too short
  • 🤔 Puzzles can be difficult
  • 🗺️ Map can be confusing
  • 🤷‍♀️ Some don't understand the story
  • 🎶 Music not to everyone's taste

Flat Machine

From 68 App Store ratings

What we love

  • 👍 Highly engaging gameplay
  • 💖 Compelling characters and story
  • 💡 Multiple endings and replayability
  • ✨ Unique post-apocalyptic world
  • 🎮 Satisfying progression and strategy

Room to improve

  • 🐛 Ad issues (app store redirection)
  • 🐛 Ads sometimes break BGM
  • ⚖️ Endless mode can feel like pure luck
  • ❓ Some events seem to have limited interactions
  • 🚫 Lack of Chinese translation

Bugs and requests

GenEi AP

Requested features

4 requests
  • Add a reset button
  • Make more games like this
  • Add a rhythm game function
  • Create a sequel or update

Flat Machine

Reported bugs

4 issues
  • Ads redirect to app store and prevent item rewards
  • Ad BGM continues playing after ad ends
  • Ad BGM persists even after restarting app
  • Agoda ads prevent continuing the game

Requested features

6 requests
  • Add Chinese translation
  • Add Vietnamese translation
  • Add Spanish translation
  • Option for one-time purchase to remove ads
  • More interactions with certain characters (e.g., training robot)
Show 1 more
  • Consider adding taxi or bakery characters in future works

In-app purchases

None

GenEi AP

No in-app purchases

4 purchases

Flat Machine

One-time4
  • AD removal$2.99
  • Donation(S)$3.99
  • Donation(M)$14.99
Show 1 more
  • Donation(L)$34.99

Questions

Is GenEi AP free?
GenEi AP is free to download, with no in-app purchases.
Is Flat Machine free?
Flat Machine is free to download, with in-app purchases available.
Which has better reviews, GenEi AP or Flat Machine?
GenEi AP is rated higher. GenEi AP averages 5.0 out of 5 from 131 ratings, while Flat Machine averages 4.9 from 68 ratings.
Do GenEi AP or Flat Machine have ads?
Flat Machine shows ads; GenEi AP does not.
Which is updated more often, GenEi AP or Flat Machine?
GenEi AP ships an update every 2 months, and Flat Machine every 5 days. Most recently, GenEi AP was updated on October 13, 2026 and Flat Machine on October 15, 2026.

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