Comparison

Rainy Glass vs Pendulum Wave 3D

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

Head to head
About

Rainy Glass

Experience photorealistic virtual rain with customizable backgrounds. You can even use your device's camera feed as a backdrop. Enhance your experience with optional lightning effects and interactive screen wiping.

Highlights
  • Virtual photorealistic rain
  • Customizable background photos
  • Use device camera as background
  • Interactive screen wiping
  • Optional lightning effects
Features
Read full description

Transform your device into a calming virtual window. Rainy Glass delivers a beautifully minimalist, photorealistic rain experience designed to help you relax, focus, and find a moment of chill. Features • Photorealistic Rain: Experience high-quality, lifelike raindrops on your screen. • [New] Photo & Looping Video Backgrounds: Import your own aesthetic photos and videos, or choose from our built-in scenic images. Videos loop automatically, creating an endless, relaxing window to anywhere you want. • Interactive Glass: Swipe across the screen to wipe the rain and fog away. • Immersive UI: Controls automatically fade out for a clean, distraction-free view. Premium Features • Screen Recording: Capture your custom rainy scenes (.mp4, up to 60s, excluding UI buttons) to save or share with others. • Live Camera Background: Overlay rain onto your device’s live camera feed in real-time. • Lightning Effects: Tap to trigger dynamic lightning strikes for an immersive stormy atmosphere. Stay calm. Watch the rain.

About

Pendulum Wave 3D

Features
Read full description

Eighteen pendulums, released at the same instant. A perfect line for a moment — then a wave, a fold, then no pattern at all. Sixty seconds later, a perfect line again. None of that is luck. Every pendulum is given a length that makes it swing an exact whole number of times per cycle, so the scattered part was never really a mess. It was the middle of a return. It is not a looping video, and not an animation faked to look about right. It is a live physics simulation, computed frame by frame while you watch. NOBODY WROTE THE MUSIC Turn the sound on, and each pendulum rings a note once per full swing, as it crosses the bottom — higher for the short ones, lower for the long ones. Only five notes of the scale are used (do, re, mi, so, la), spread across octaves, so they stay clear no matter how many sound at once. There is no composer here. The lengths are the melody. The moment everything lines up is the quietest one — all eighteen are at the far end of their arc, none of them crossing the bottom. A breath later, eighteen notes come down in a run, high to low, in under a fifth of a second. You are hearing exactly what you are watching. ANY ANGLE YOU LIKE Drag to put the camera anywhere. From an angle, a row of swinging pendulums. From directly above, a wave running along the row. The motion never changes. The angle does all the work. Four layouts: a straight Line; a Circle, where the wave travels around the ring; a Spiral winding outward; and a Grid, where the swing spreads like woven mesh — the more pendulums you add, the clearer the weave. Four color themes — Cool, Neon, Mono, Sunset. The bobs glow softly. Turn on Light trails in the Display panel, and each one leaves a line of light hanging in the air behind it. CINEMA MODE One tap: the controls disappear, the camera begins a slow orbit, and the ad goes with them. A waiting room screen, a tablet on the edge of a desk, a dark room late at night. It becomes something to look at, and nothing else. ALSO INSIDE • Set the number of pendulums, the cycle length, the swing angle and the speed • Save any setup you like as a preset • A data panel listing every pendulum's swings, length and period • "How it works" — the real explanation, in plain words, no equations • Available in 33 languages • No account, no sign-in. iPhone and iPad ABOUT THE ADS The app is free. There is one small banner at the bottom of the screen — no full-screen ads, no video ads — and in Cinema mode even that banner disappears. Before the first ad, the app asks you — on iPhone and iPad for permission to track; in Europe, a consent screen comes first. Accept, and ads may be matched to your interests; decline, and the banner still appears, simply unmatched. You can change your answer later: the consent in the app's settings, the tracking permission in iOS Settings. The app itself never asks for your name or email. To show the banner, Google AdMob uses standard advertising data (an advertising identifier and approximate location derived from your IP). See our Privacy Policy for details. Don't stop watching while it is scattered. Stay until it lines up again.

Screenshots

Rainy Glass3 screens
Pendulum Wave 3D4 screens

Verdict

The call

The clearest difference is in-app purchases: Pendulum Wave 3D at none against Rainy Glass's 5. Pendulum Wave 3D also leads on ads (none vs shown). Rainy Glass's advantage is update cadence (every 3 days vs every 10 days). On price, 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. Rainy Glass sells 5 one-off in-app purchases. Pendulum Wave 3D asks for nothing beyond the download.

UpkeepUpdate frequency

Rainy Glass ships an update every 3 days, Pendulum Wave 3D every 10 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Rainy Glass versus Pendulum Wave 3D: the parameters behind the verdict, then further details
ParameterRainy GlassPendulum Wave 3D
PriceFreeFree
Rating4.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 days — betterEvery 10 days
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size128 MB10 MB
Age rating4+4+
Developeronion c Inc.Takashi Nemoto

In-app purchases

5 purchases

Rainy Glass

One-time5
  • Thunder Effect Access$0.99
  • Unlock firing thunder 2$0.99
  • Camera Background Access$1.99
Show 2 more
  • Unlock camera input 2$1.99
  • Screen Recording Access$2.99
None

Pendulum Wave 3D

No in-app purchases

Questions

Is Rainy Glass free?
Rainy Glass is free to download, with in-app purchases available.
Is Pendulum Wave 3D free?
Pendulum Wave 3D is free to download, with no in-app purchases.
Do Rainy Glass or Pendulum Wave 3D have ads?
Rainy Glass shows ads; Pendulum Wave 3D does not.
Which is updated more often, Rainy Glass or Pendulum Wave 3D?
Rainy Glass ships an update every 3 days, and Pendulum Wave 3D every 10 days. Most recently, Rainy Glass was updated on October 21, 2026 and Pendulum Wave 3D on October 24, 2026.

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