Choo vs NULLORBIT
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Choo
Embark on a thrilling adventure to defeat a monstrous train. Upgrade your own engine with powerful weapons and items obtained from townspeople to prepare for a final, epic battle.
- Navigate treacherous tracks
- Upgrade your train
- Acquire powerful weapons
- Complete missions
- Fight a monstrous train
- Explore a massive play area
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Charles is a bloodthirsty train, and you need to destroy him. Navigate a massive play area in your trusty old engine: These winding tracks are treacherous, so you'll need to plan each mission carefully. Be wary when traveling on foot, or switching the track's direction; Charles might be waiting for you. Upgrade your train to fit your needs: Go looting or complete missions to find "Scraps", which can be used to turn your train into a death machine on wheels. Get help from the townspeople: Help out the settlers in return for high powered weapons, and other items vital to Charles' destruction. Fight Charles to the death: Complete the main questline, and summon Charles to a mortal duel. If you’ve gained enough strength, firepower, and skill, Charles may finally meet his match.
NULLORBIT
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NULLORBIT is a fast-paced top-down space shooter built for your phone. Pick a ship, blast off into a shared arena, and fight, fly, and loot your way to the top. Pilot one of eight unique ships, from the nimble Warbird to the heavy hitting Leviathan, each with its own feel, weapons, and role on the battlefield. Float through frictionless space, line up the perfect shot, and dodge incoming fire with quick thumb taps. Every match drops you into a living arena with other real players. The maps are hand crafted and stay fixed, so you learn every choke point, every safe zone, and every bombing line. But the action is never the same twice. Scattered across each map are power ups that boost your guns, shields, and abilities. Grab them, stack them, and turn yourself into a flying fortress. The catch? When you die, you lose it all and respawn fresh. Every life is a new run, every kill makes the next fight harder. GAME MODES - Capture the Flag: grab the enemy flag, hold your base, win as a team - Team Deathmatch: squad up and out frag the other side - Deathmatch: every pilot for themselves, last score standing wins BUILT FOR MOBILE - Drag to move and aim, tap to fire, made for touch from the ground up - Quick matches you can pick up and put down anywhere - Light on data, easy on battery, no install bloat A NOD TO THE CLASSICS NULLORBIT is inspired by SubSpace and Continuum, the 90s online space shooters with a loyal cult following. It uses the same iconic ships and feel, including a tribute to the legendary Trench Wars arena, but rebuilt from scratch for a new generation and a faster, more accessible mobile experience. Whether you have ten seconds or ten minutes, jump in, pick a ship, and see how long you can survive.
Screenshots
Verdict
The clearest difference is price: NULLORBIT at Free against Choo's $4.99. Choo's advantage is update cadence (every 3 weeks vs every 2 months) and chart position (#81 vs unranked). On ads, in-app purchases 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
NULLORBIT is free to download; Choo costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Choo ships an update every 3 weeks, NULLORBIT every 2 months. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.
| Parameter | Choo | NULLORBIT |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.9 (33 ratings) — better | — |
| Positive reviews | 95.8% of reviews | — |
| Number of ratings | 33 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #81 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1.7 GB | 24 MB |
| Age rating | 17+ | 12+ |
| Developer | Gavin Eisenbeisz | Terrence Sheflin |
In-app purchases
Choo
No in-app purchases
NULLORBIT
No in-app purchases









