Random Picker vs Digital Memory Challenge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Random Picker
This entertainment app simulates drawing lucky numbers using a 3D physics engine. Create multiple boxes, each with 100 numbers, and customize the appearance of the lucky ball. Designed purely for amusement.
- 3D Physics Engine
- Multiple Lucky Boxes
- Customizable Ball Color
- Number Selection
- Entertainment Focused
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3D Physics Engine Lucky Number Simulator - Your lucky number might be here! Create multiple Lucky Boxes. Each box contains 100 numbers to choose freely. Change the Lucky Ball's color as you like (Slide your finger up/down on the color bar to adjust brightness). #For Entertainment Purposes Only#
Digital Memory Challenge
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1.该APP分为竞速（仅当答完所有题目，才能出正确率、总耗时、平均耗时等数据。）和生存（若解题失败，则直接结束）2种模式。 2.每个模式下又分为验证码、N网格和卡片翻转的玩法。 3.每种玩法又有自己的独特配置项 3.1.验证码：可配置难度、验证码的长度和题目数量等 3.2.N网格：可配置难度、网格的类型（如2*2、6*6等）和题目数量等 3.3.卡片翻转：可配置难度、网格的类型（如3*3、5*5等）和题目数量等
Screenshots
Verdict
The clearest difference is price: Random Picker at Free against Digital Memory Challenge's $0.99. Random Picker also leads on update cadence (monthly vs every 3 months). Digital Memory Challenge's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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
Random Picker is free to download; Digital Memory Challenge costs $0.99 up front. Random Picker sells 1 one-off in-app purchase. Digital Memory Challenge asks for nothing beyond the download.
Random Picker ships an update monthly, Digital Memory Challenge every 3 months. The most recent releases landed on October 27, 2026 and October 12, 2026 respectively.
| Parameter | Random Picker | Digital Memory Challenge |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.6 (115 ratings) — better | — |
| Positive reviews | 77.3% of reviews | — |
| Number of ratings | 115 — better | — |
| Update frequency | Monthly — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | 伟 雷 | 元宝 陈 |
In-app purchases
Random Picker
- Professional$1.99
Digital Memory Challenge
No in-app purchases
Questions
Is Random Picker free?
Is Digital Memory Challenge free?
Do Random Picker or Digital Memory Challenge have ads?
Which is updated more often, Random Picker or Digital Memory Challenge?
Other comparisons
