OIOI vs Random Reminder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OIOI
This AI-powered assistant offers intelligent learning support across various subjects, from English and math to programming and creative writing. It can also adopt different roles to assist with tasks like translation, interview preparation, and travel planning.
- Answers English learning questions
- Guides math problem-solving
- Provides instant knowledge retrieval
- Assists with essay planning
- Helps debug programming issues
- Communicates in multiple languages
- Inspires poetry and art creation
- Adopts various service roles
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OIOI 提供智能、即时的智能学习体验: • 回答你英语学习相关问题 • 指导你解决数学问题 • 迅速搜罗并提供所需知识 • 为你论文规划提供启发 • 协助你调试程序中的问题 • 使用多种语言与你沟通 • 辅助你创作诗歌 • 提供绘画的灵感 • 切换各种角色为你服务:翻译、面试指导、学习咨询、旅行协助、健身指南... • 联动其他APP,如墨墨背单词 AI 阅读、语法标识等功能 OIOI 致力于成为你学习和生活中不可或缺的伙伴,无论你在哪里,它都将为你提供全面、专业的支持。
Random Reminder
This app helps you achieve deep focus quickly through a unique method involving random sound reminders and short breaks. It's designed to improve attention, memory, and learning performance by leveraging principles like neural replay and ultradian rhythms.
- Random sound interval reminders
- 10-second micro-breaks
- 90-minute focus sessions
- Neural replay for memory
- Variable ratio reinforcement
- Zeigarnik effect utilization
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“Random Reminder” is a new focus method designed to help you enter deep focus quickly. More than 400 people worldwide use it every second. With this method, you can stay focused for up to 90 minutes, improve your attention and memory, and enter a flow state more easily. == A New Focus Method == - Set a sound to play at random intervals (e.g., every 3–5 minutes). - Each time you hear the reminder sound, immediately close your eyes and rest for 10 seconds. - Then return to your work or study and continue focusing. Repeat this process until the 90-minute session ends. - After 90 minutes, take a 20-minute break. == Based on Four Core Principles == ■ Neural Replay During micro-breaks, your brain "replays" recently learned information at high speeds, improving memory retention and learning performance. ■ Variable Ratio Reinforcement Randomized feedback keeps the brain’s dopamine system engaged. Not knowing exactly when the next sound will occur maintains a healthy level of alertness and motivation. ■ Zeigarnik Effect Briefly interrupting a task creates a psychological "open loop." This makes your brain more eager to complete the task, helping you dive back in more effectively. ■ Ultradian Rhythms (90/20 Rule) The human brain naturally operates in 90-minute high-frequency cycles. Following this rhythm prevents burnout and maximizes mental endurance. ====== Personal growth website: https://zeenzeen.com Creator: 择恩 ====== “Random Reminder” can be downloaded and used for free. Core features are completely free. We also offer premium membership features to enhance the user experience. If you choose to subscribe to the premium membership, your iTunes account will be charged accordingly. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current subscription period. After subscribing, you can manage your subscription in your iTunes Store account settings. Privacy Policy https://zeenzeen.com/privacy Terms of Use https://zeenzeen.com/tos End User License Agreement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Random Reminder at 83% against OIOI's 0%. Random Reminder also leads on device support. OIOI's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.0). On price 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
Both are free to download. Random Reminder sells 4 in-app purchases, starting at $2.99 per month. OIOI asks for nothing beyond the download.
| Parameter | OIOI | Random Reminder |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (18 ratings) — better |
| Positive reviews | 0.0% of reviews | 83.3% of reviews — better |
| Number of ratings | — | 18 — better |
| Update frequency | — | Weekly |
| Ads | — | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | — | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 69 MB | 43 MB |
| Age rating | 17+ | 4+ |
| Developer | Qingyuan Mohai Technology Co., Ltd | 志高 谢 |
Customer experience
OIOI
Random Reminder
In-app purchases
OIOI
No in-app purchases
Random Reminder
- 月度高级会员$2.991 Month
- 季度高级会员$9.993 Months
- 年度高级会员$24.991 Year
- 违约成本$0.99









