THE SPECTRUM vs DuelAF
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
THE SPECTRUM
Guide falling photons to collect hues evenly and create a unique spectrum. This immersive experience is best enjoyed in a dark room, allowing the ever-changing motion of lights to spark your imagination.
- Collect falling photons
- Create a color spectrum
- Evenly collect hues
- Immersive light motion
- Spark imagination
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You are the light. Millions of photons are falling. Let's start a journey to seize the lights. If you hit a photon, you can get it, The collected color is displayed as the spectrum. The goal is to collect hues evenly. When you move the flow is disturbed, However, it is sometimes useful to capture more light. The ever-changing motion of lights invokes your imagination. Let's weave a story only for you. * When playing with the room dark You can enjoy a more immersive experience.
DuelAF
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DuelAF is a fast, fun two-player duel you play on one phone. Hold the phone from opposite ends. Wait for the countdown. The instant the screen says FIRE — tap your side. Fastest draw wins. Tap too early and you lose the round. Simple. Brutal. Addictive. No accounts. No internet. No nonsense. Just you, a friend, and a phone. HOW TO PLAY - Two players, one device — each grabs an end - Watch for READY, then the random pause, then FIRE - First to tap their half wins the round - Itchy trigger finger? Tap before FIRE and you're done - Win the match by taking enough rounds PICK YOUR DUELISTS - Western — classic cowboys, six-shooters at the hip - Robots — laser-cannon arms and a beam to the chest - Aliens — ray guns and a vaporizing finish FEATURES - Lightning-fast local multiplayer on a single screen - Three themed showdowns, each with its own draw and death - Reaction times tracked every round - Stats and a kill gallery to show off - Clean, minimalist black-and-white style - Free. No ads. No data collected. Grab a friend. Grab a phone. Find out who's faster. Are you quick enough?
Screenshots
Verdict
The clearest difference is iOS requirement: THE SPECTRUM at 8.0 against DuelAF's 16. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.
| Parameter | THE SPECTRUM | DuelAF |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 16 |
| Further details — not scored | ||
| Size | 40 MB | 17 MB |
| Age rating | 4+ | 12+ |
| Developer | KEITA YASUI | Adrian Gonzalez |
In-app purchases
THE SPECTRUM
No in-app purchases
DuelAF
No in-app purchases









