# OIOI vs Random Reminder

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.

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.

## The numbers

| Metric | OIOI | Random Reminder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (18 ratings)](https://appshunter.io/ios/app/random-reminder-focus-timer/id6745423696/reviews)** |
| Number of ratings | — | **18** |
| Positive reviews | 0.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Weekly |
| Monetization | **Free** | Freemium |
| Size | 69 MB | 43 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Qingyuan Mohai Technology Co., Ltd](https://appshunter.io/developer/1591552261) | [志高 谢](https://appshunter.io/developer/1811717824) |

## What reviewers say

### OIOI

[App page](https://appshunter.io/ios/app/oioi-ai/id6474110428)

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.

**Highlights:** 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

**In-app purchases:** none


### Random Reminder

[App page](https://appshunter.io/ios/app/random-reminder-focus-timer/id6745423696)

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.

**Highlights:** Random sound interval reminders, 10-second micro-breaks, 90-minute focus sessions, Neural replay for memory, Variable ratio reinforcement, Zeigarnik effect utilization

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度高级会员 | $2.99 | per month |
| 季度高级会员 | $9.99 | per 3 months |
| 年度高级会员 | $24.99 | per year |
| 违约成本 | $0.99 | one-time |


## Frequently asked questions

### Is OIOI free?

OIOI is free to download, with no in-app purchases.

### Is Random Reminder free?

Random Reminder is free to download, with in-app purchases available.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*