Comparison

3D Spinner vs Krun

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

Head to head
About

3D Spinner

Experience the most realistic virtual fidget spinner with lifelike physics, 3D graphics, and sound. Interact with various spinners, explore different materials and bearings, and enjoy simulated vibrations for an immersive experience.

Highlights
  • Realistic 3D graphics and sound
  • Lifelike physics and spin times
  • Variety of spinner materials and bearings
  • Simulated vibration effects
  • Gyroscope and accelerometer interaction
  • Adjustable RPM and spin time display
Features
Read full description

3D Spinner - the most realistic virtual fidget spinner app you can get! Featuring realistic physics, 3D graphics and sound, 3D Spinner lets you play with a variety of fidget spinners as if you're really holding them. Just touch the screen and see your finger interact with the spinner as if it's really there. Move the device around to view and spin the spinner from any angle using the gyro. Or hold the center of the spinner with one hand and spin with the other, rotating the device to feel simulated gyroscopic effects with actual vibration just like the real thing! Features: - Realistic 3D graphics and sound - Realistic physics and spin times - Plastic 3-sided spinners, metal 2-sided spinners, different metals like anodised aluminium, luminescent plastic, brass and even solid gold spinners! - Spinners have different main bearings - steel, steel-ceramic hybrid and full ceramic ball bearings for even longer spin times - Vibration when rotating while holding just like the real thing - Various options are available such as removing bearing covers or the center caps to see the ball bearings in action - Option to show RPM and spin time - Option to disable the gyro/accelerometer to pan/zoom the view manually Fidget spinners are claimed to help with relieving stress and anxiety, and even ADHD. 3D Spinner tries to be as close to simulating a real fidget spinner as possible, so if the claims are true, then this app might help relieve those conditions too. 3D Spinner - a great fidget toy and stress-reliever, not just for kids but adults too!

About

Krun

Engage with a digital pinwheel that creates captivating optical illusions as it spins and slows. Customize shapes, colors, and speed for a unique visual experience. It's a simple yet mesmerizing tool for all ages.

Highlights
  • Swipe-to-spin pinwheels
  • Illusions appear as rotation slows
  • Shape, color, and speed customization
  • Unlock all content
  • Remove ads
Features
Read full description

Spin a pinwheel and watch hidden shapes appear while it's moving. Swipe to spin, then enjoy optical illusions as the speed changes. Simple and intuitive for kids and adults. • Swipe-to-spin pinwheels • Illusions that appear as rotation slows • Shape, color, and speed customization • Premium: unlock all and remove ads

Screenshots

3D Spinner4 screens
Krun4 screens

Verdict

The call

The clearest difference is rating: 3D Spinner at 5.0 against Krun's 1.0. 3D Spinner also leads on in-app purchases (none vs 1) and ads (none vs shown). Krun's advantage is update cadence (every 3 days vs every 42 months). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Krun sells 1 one-off in-app purchase. 3D Spinner asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

3D Spinner holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

3D Spinner ships an update every 42 months, Krun every 3 days. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
3D Spinner versus Krun: the parameters behind the verdict, then further details
Parameter3D SpinnerKrun
PriceFreeFree
Rating5.0 (2 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 42 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better16.6
Further details — not scored
Size59 MB6 MB
Age rating4+4+
DeveloperDemonStudiosShinichiro Eto

Customer experience

3D Spinner

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Krun

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

3D Spinner

No in-app purchases

1 purchases

Krun

One-time1
  • Premium Unlock$2.99

Questions

Is 3D Spinner free?
3D Spinner is free to download, with no in-app purchases.
Is Krun free?
Krun is free to download, with in-app purchases available.
Which has better reviews, 3D Spinner or Krun?
3D Spinner is rated higher. 3D Spinner averages 5.0 out of 5 from 2 ratings, while Krun averages 1.0 from 1 ratings.
Do 3D Spinner or Krun have ads?
Krun shows ads; 3D Spinner does not.
Which is updated more often, 3D Spinner or Krun?
3D Spinner ships an update every 42 months, and Krun every 3 days. Most recently, 3D Spinner was updated on October 4, 2026 and Krun on October 9, 2026.

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