Gravity 80s vs Rubber Ducks!
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Gravity 80s
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Gravity Dot is a space physics puzzle game where you pilot a tiny dot-ship through procedurally generated solar systems using only planetary gravity and a limited fuel thruster. No waypoints. No autopilot. Just you, inertia, and gravity. ARCADE MODE Progress through increasingly complex solar systems. Use swing-by maneuvers to navigate around planets, avoid black holes, and reach the target star. Drain its energy to clear the mission, then spend earned energy on upgrades at the Hangar. 3 lives per run — one wrong orbit and it's game over. ENDLESS MODE Explore an infinite universe with no fuel limits. Absorb energy from any planet for score and drift as far as you can. Unlocked after clearing Mission 5. HOW TO PLAY - Drag anywhere to aim your thruster - Hold to accelerate — fuel is limited, use it wisely - Release to coast on inertia - Use planetary gravity to slingshot, brake, and change direction - Pinch to zoom in and out FEATURES - Real swing-by physics powered by a custom Velocity Verlet engine - 300+ real celestial bodies from astronomical catalogs - 17 procedural planet shaders — gas giants, ice worlds, lava planets, black holes, and more - 4 distinct map layouts — solar system, corridor, cluster, and dual core - 6-category upgrade system with 10 levels each - Rogue planets and binary moons at higher levels - Real-time orbit prediction line - Planet scan HUD identifying nearby celestial bodies - Full planet catalog tracking every encounter - All sound effects and ambient music synthesized at runtime — zero audio files - Retro pixel art visuals - Game Center leaderboards No ads. No in-app purchases. Just pure space physics.
Rubber Ducks!
A casual merge game where you drop rubber ducks into a tub, matching identical ones to create rarer and more unusual designs. Aim for a high score while managing the tub's space and discovering new duck characters. Perfect for quick, relaxing play sessions.
- Casual merge gameplay
- Cute rubber duck characters
- Relaxing bathtub setting
- Score-chasing mechanics
- Discover new duck designs
- Regular updates planned
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Rubber Ducks! is a drop and merge game where you launch ducks into a tub and seeing how far you can go. Merge matching rubber ducks to create bigger, rarer, and more ridiculous ducks. Keep the tub from overflowing, chase a higher score, and discover what strange little duck comes next. The game is simple to play: drop a duck, match it with the same duck, and watch them merge into something new. As the tub fills up, every move matters a little more. Features: Easy, casual merge gameplay Cute rubber duck characters Relaxing bathtub setting Score-chasing fun More duck designs coming soon New themes, settings, and surprises planned for future updates Rubber Ducks! is made for quick breaks, casual play, and anyone who enjoys cute, dorky games that do not take themselves too seriously. The first version is just the beginning. More duck ideas, new locations, fresh styles, and weirder little duck friends are coming over time.
Screenshots
Verdict
The clearest difference is ads: Gravity 80s at none against Rubber Ducks!'s shown. Gravity 80s also leads on update cadence (every 2 days vs every 6 days). On price, in-app purchases, device support and iOS requirement 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.
Gravity 80s ships an update every 2 days, Rubber Ducks! every 6 days. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.
| Parameter | Gravity 80s | Rubber Ducks! |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (6 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 2 days — better | Every 6 days |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 219 MB |
| Age rating | 4+ | 4+ |
| Developer | kota morishita | Racoza Studios, LLC |
In-app purchases
Gravity 80s
No in-app purchases
Rubber Ducks!
No in-app purchases









