Comparison

OPYC vs Juno

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

Head to head
About

OPYC

Experience realistic sailing with this physics-based simulation. It uses real-time wind forecasts and offers immersive 3D views with dynamic weather and sea conditions. Compete in races or explore the world by earning in-game coins.

Highlights
  • Physics-based sailing simulation
  • Real-time wind forecasts
  • Immersive 3D view
  • Weather routing optimization
  • Create races and regattas
  • Earn in-game coins
Features
Read full description

OPYC* is a worldwide sailing simulation using physics. The game runs locally on your device, using laws of physics. It is different from other web sailing games that run on a server, whether you are actively sailing or not. This allows the game to be more like real sailing, with waves, Chinese jibes, flapping sails and unexpected situations. Go out of control in strong winds. Its quantum sailing. The simulation uses real wind forecasts from NOAA GFS. Interpolated real time winds ( 144h forecast, 3 hour interval ). VRTool chart tool embedded. Download wind grid and perform weather routing optimizations. Draw routes and tracks. Add marks. Manage chart objects. To participate, you have to register a boat name, skipper name, password and choose a port to start from. May be used in multiple devices. Last device connecting has the key. Use boat name and password to login. Earn OPYC coins by finding and crossing gates around the world (currently gates only in North, South, Central Americas and Europe). You can also select a venue and create a race (triangle or linear course). Create a regatta and invite your friends to participate. The new 3D view brings immersive sailing challenges, with sea waves, dynamic sail shapes, oscillating wind arrow and other characters. * OPYC, short for Old Pelican Yacht Club, since 2018 serving the virtual sailing community with navigation software and weather forecasts.

About

Juno

Build and test rockets, planes, and cars with realistic physics in a 3D aerospace sandbox. Progress through a career mode, unlock new technology, and share your creations with a global community.

Highlights
  • 3D aerospace sandbox
  • Realistic physics simulation
  • Career mode with tech tree
  • Customizable part resizing and reshaping
  • Download and share user-created crafts
  • Realistic orbit simulation
  • Interactive tutorials
Features
Read full description

Juno: New Origins is a 3D aerospace simulator where players can build and test rockets, planes, cars, or anything they can imagine in an environment with realistic physics across land, sea, air, and space. This is the free-to-play version, including most of the content from the Complete Edition, with the rest being available to purchase as 3 individual bundles right from the app. If you would prefer a one-time purchase, please check out "Juno: New Origins Complete Ed." on the App Store. AEROSPACE SANDBOX Juno: New Origins is a 3D aerospace sandbox where players can use customizable parts to construct and test rockets, planes, cars, or anything they can imagine in an environment with realistic physics across land, sea, air, and space, and a vast system to explore. CAREER MODE + TECH TREE Take control of your own aerospace company and earn money and tech points as you progress through the game. Complete contracts to earn money, and discover a mixture of hand-crafted and procedural contracts that offer countless hours of new gameplay. Conquer milestones and explore landmarks to earn tech points and unlock new technology in the tech tree. Interactive tutorials are available to show how to build and operate rockets, cars, and airplanes. RESIZE AND RESHAPE PARTS Stretch and shape fuel tanks, wings, cargo bays, fairings, and nose cones with easy-to-use tools that help you create exactly what you want. Resize solar panels, landing gear, pistons, etc to fit your needs. Paint your craft custom colors and textures, and even change the material properties to make it transparent, metallic and even shiny. DOWNLOAD CRAFTS AND SHARE Download from a huge collection of user-uploaded crafts and sandboxes on https://simplerockets.com. Upload your own crafts and sandboxes and share them with the community. Rise through the ranks from a white level builder to a gold level builder and beyond and make friends from all around the world. REALISTIC ORBIT SIMULATION Orbits are realistically simulated and support time-warp so you don't have to wait several months to reach another planet. The Map View makes it easy to see your orbits and plan future burns, which you can use to set up future encounters with other planets or satellites. UPGRADE YOUR EXPERIENCE Bring your game to a next level with bundles that adapt to your playing style. Customize and automate your crafts with the Engineer Bundle, break physics and unleash your wildest designs with the Sandbox Bundle, or conquer the Juno System and become rich with the Career Bundle. ENGINEER BUNDLE * Become an engineer Easily tweak the parameters that define both the looks and function of rocket engines, jet engines, propellers and wheels * Become a programmer Automate your crafts with an easy to use visual programming language called Vizzy * Become a designer Create subassemblies to use them as templates when creating your crafts SANDBOX BUNDLE * Unleash the beast Get access to all the in-flight cheats such as infinite fuel and teleport, and the designer's Tinker Panel madness allowing you to change hundreds of hidden parameters * Get the full sandbox experience Get access to all the planets and launch locations in sandbox mode and keep as many crafts in flight as you want to conquer the Juno System * Explore community systems Choose between hundreds of custom systems made by other players and get ready to explore them in a couple clicks CAREER BUNDLE * Meet 3 new customers Professor von Pricklespac, General Chuck Schafer and the director of the Droo Space Center, Evelyn Shotwell * Dozens of new unique contracts Unlock new launch locations, bring payloads to orbit, explore the planets and moons of Juno... and many other new challenges to beat * Complete your career * Unlock the full Tech Tree and visit all the landmarks in the Juno System

Screenshots

OPYC4 screens
Juno4 screens

Verdict

The call

The clearest difference is rating: Juno at 3.8 against OPYC's 2.6. Juno also leads on review sentiment (62% vs 20%) and ratings volume (309 vs 8). OPYC's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Juno sells 4 one-off in-app purchases. OPYC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Juno holds the better App Store score, 3.8 against 2.6. That said, the two scores are not equally well evidenced: Juno has 309 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 20% of OPYC's written reviews are positive against 62% of Juno's.

UpkeepUpdate frequency

OPYC ships an update every 3 months, Juno monthly. The most recent releases landed on June 1, 2026 and September 22, 2026 respectively.

Scorecard8 real differences · 2 level
OPYC versus Juno: the parameters behind the verdict, then further details
ParameterOPYCJuno
PriceFreeFree
Rating2.6 (8 ratings)3.8 (309 ratings) — better
Positive reviews20.0% of reviews61.6% of reviews — better
Number of ratings8309 — better
Update frequencyEvery 3 monthsMonthly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better14.0
Further details — not scored
Size70 MB412 MB
Age rating4+4+
DeveloperOmar reisJundroo, LLC

Customer experience

OPYC

All ratings8 ratings
Positive25.0%
Neutral37.5%
Negative37.5%
Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

Juno

All ratings309 ratings
Positive67.6%
Neutral9.7%
Negative22.7%
Written reviews263 reviews
Positive61.6%
Neutral9.9%
Negative28.5%

Bugs and requests

OPYC

Not enough reviews yet to summarise bugs or requests.

Juno

Reported bugs

5 issues
  • Engines not igniting properly
  • Inability to restore purchases
  • Sandbox mode missing key parts
  • Severe performance issues on some devices
  • Inconsistent part movement and attachment

Requested features

5 requests
  • Add more plane and rocket parts
  • Improve mobile optimization and controls
  • Implement a more comprehensive tutorial system
  • Add a 'delete all' or 'clear' option
  • Introduce a free sandbox mode with all features unlocked

In-app purchases

None

OPYC

No in-app purchases

4 purchases

Juno

One-time4
  • Engineer Bundle$0.99
  • Remove Ads$1.99
  • Sandbox Bundle$2.99
Show 1 more
  • Career Bundle$4.99

Questions

Is OPYC free?
OPYC is free to download, with no in-app purchases.
Is Juno free?
Juno is free to download, with in-app purchases available.
Which has better reviews, OPYC or Juno?
Juno is rated higher. OPYC averages 2.6 out of 5 from 8 ratings, while Juno averages 3.8 from 309 ratings.
Do OPYC or Juno have ads?
Juno shows ads; OPYC does not.
Which is updated more often, OPYC or Juno?
OPYC ships an update every 3 months, and Juno monthly. Most recently, OPYC was updated on June 1, 2026 and Juno on September 22, 2026.

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