Comparison

Lotto Engine 3D vs Spectroslide

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

Head to head
About

Lotto Engine 3D

This app simulates the physics of balls moving within a container, acting as a fun random number and ball generator. It's a useful tool for various applications, offering a creative and engaging experience.

Highlights
  • Physics engine simulation
  • Random ball generation
  • Random number generation
  • Creative utility tool
  • Automatic subscription option
Features
Read full description

A creative app that simulates the movement of a ball in a container, based on a real physics engine, a fun random ball generator and random number generator. It is a must-have gadget at home. ----------------------------------- 【Lotto Engine 3D Automatic Subscription Instructions】 1. Service Name: Lotto Engine 3D Weekly Subscription 2. Subscription period: 1 week 3. Price: $1.99 4. If you need to cancel the subscription, please manually open the "Settings" of iOS --> go to "iTunes Store & App Store" --> click "Apple ID", select "View Apple ID", enter the "Account Settings" page, click "Subscriptions", and select Lotto Engine 3D Weekly Subscription to cancel the subscription. If you do not close your subscription at least 24 hours before the end of the period, it will automatically renew. 5. Service Agreement (including rules for automatic subscription of super members): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ 6. Privacy Agreement: https://github.com/denghejun/lotto_engine_tech_support/blob/main/privacy.md

About

Spectroslide

Features
Read full description

Spectroslide is a static noise generator that allows the user to discover their own custom sound. Slide up and down to navigate to the different frequencies ("red", "pink", and "brown") and background colors, and left and right to change the audible pitch and color hue. The app will save your favorite spot, and you can change it any time you like after a 1 second press on the screen.

Screenshots

Lotto Engine 3D3 screens
Spectroslide3 screens

Verdict

The call

The clearest difference is in-app purchases: Spectroslide at none against Lotto Engine 3D's 2. Lotto Engine 3D's advantage is update cadence (daily vs every 9 months) and iOS requirement (13.0 vs 17.5). On price, ads 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. Lotto Engine 3D sells 2 in-app purchases, starting at $1.99 per 7 days. Spectroslide asks for nothing beyond the download.

UpkeepUpdate frequency

Lotto Engine 3D ships an update daily, Spectroslide every 9 months. The most recent releases landed on September 23, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 6 level
Lotto Engine 3D versus Spectroslide: the parameters behind the verdict, then further details
ParameterLotto Engine 3DSpectroslide
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyDaily — betterEvery 9 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.5
Further details — not scored
Size19 MB2 MB
Age rating4+4+
Developer何均 邓Eric Hamiter

In-app purchases

2 purchases

Lotto Engine 3D

Subscriptions1
  • Lotto Engine 3D Weekly Subs$1.997 Days
One-time1
  • Lotto Engine 3D Lifetime Right$3.99
None

Spectroslide

No in-app purchases

Questions

Is Lotto Engine 3D free?
Lotto Engine 3D is free to download, with in-app purchases available.
Is Spectroslide free?
Spectroslide is free to download, with no in-app purchases.
Do Lotto Engine 3D or Spectroslide have ads?
Neither Lotto Engine 3D nor Spectroslide shows ads.
Which is updated more often, Lotto Engine 3D or Spectroslide?
Lotto Engine 3D ships an update daily, and Spectroslide every 9 months. Most recently, Lotto Engine 3D was updated on September 23, 2026 and Spectroslide on October 13, 2026.

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