# 知格闪卡 vs Rulvo

The clearest difference is iOS requirement: 知格闪卡 at 15.1 against Rulvo's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 知格闪卡 sells 1 one-off in-app purchase and Rulvo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

知格闪卡 ships an update every 4 days, Rulvo every 5 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 知格闪卡 | Rulvo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rulvo/id6807753839/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 39 MB | 162 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [良玉 侯](https://appshunter.io/developer/1879665668) | [同德 郑](https://appshunter.io/developer/6788617584) |

## What reviewers say

### 知格闪卡

[App page](https://appshunter.io/ios/app/id6766411237)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久会员 | $5.99 | one-time |


### Rulvo

[App page](https://appshunter.io/ios/app/rulvo/id6807753839)

This app helps students manage their academic life by providing tools for scheduling, focused study sessions, and exam preparation. It features countdowns, timers, and reminders to keep users on track and prepared for their academic goals.

**Highlights:** Exam countdowns, Study session timers, Daily timetable scheduling, Reminders and alarms, Live Activity and Home Screen widgets, Learning history and daily summaries

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 格律 Pro 永久解锁 | $5.99 | one-time |


## Frequently asked questions

### Is 知格闪卡 free?

知格闪卡 is free to download, with in-app purchases available.

### Is Rulvo free?

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

### Do 知格闪卡 or Rulvo have ads?

Neither 知格闪卡 nor Rulvo shows ads.

### Which is updated more often, 知格闪卡 or Rulvo?

知格闪卡 ships an update every 4 days, and Rulvo every 5 days. Most recently, 知格闪卡 was updated on October 31, 2026 and Rulvo on November 6, 2026.

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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.*