# 叫叫口算 vs LingGrid

The clearest difference is in-app purchases: LingGrid at none against 叫叫口算's 10. LingGrid also leads on review sentiment (100% vs 69%) and update cadence (every 9 days vs every 6 weeks). 叫叫口算's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. 叫叫口算 sells 10 one-off in-app purchases. LingGrid asks for nothing beyond the download.

叫叫口算 ships an update every 6 weeks, LingGrid every 9 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 叫叫口算 | LingGrid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/linggrid/id6774998894/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 69.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | — | Free |
| Size | 146 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chengdu Shushan Youlu Technology Co., Ltd.](https://appshunter.io/developer/1748698649) | [华明 罗](https://appshunter.io/developer/1670053427) |

## What reviewers say

### 叫叫口算

[App page](https://appshunter.io/ios/app/id1570420417)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 半年卡直降40 | $19.99 | one-time |
| 半年卡 | $29.99 | one-time |
| 口算年卡直降70 | $29.99 | one-time |
| 口算买1送1直降20 | $34.99 | one-time |
| 买1年赠1年 | $39.99 | one-time |
| 口算买2年送2年再降50 | $39.99 | one-time |
| 口算买2年送2年再降60 | $39.99 | one-time |
| 买2年赠2年 | $49.99 | one-time |
| 开学特惠口算买2年送2年 | $49.99 | one-time |
| 口算618限定双享卡 | $69.99 | one-time |


### LingGrid

[App page](https://appshunter.io/ios/app/linggrid/id6774998894)

This app provides a secure digital backup for physical dynamic password cards used for the Jiangsu Gaokao. It allows users to scan or import card images, save encrypted data locally, and quickly look up codes by selecting coordinates. Designed to reduce stress during critical post-exam processes.

**Highlights:** Scan physical password cards, Import photos from album, Recognize 8x8 password grid, Save encrypted data locally, Quick code lookup by coordinates, Digital backup for password cards

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

**In-app purchases:** none


## Frequently asked questions

### Is 叫叫口算 free?

叫叫口算 is free to download, with in-app purchases available.

### Is LingGrid free?

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

### Do 叫叫口算 or LingGrid have ads?

Neither 叫叫口算 nor LingGrid shows ads.

### Which is updated more often, 叫叫口算 or LingGrid?

叫叫口算 ships an update every 6 weeks, and LingGrid every 9 days. Most recently, 叫叫口算 was updated on November 3, 2026 and LingGrid on November 5, 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.*