# 计算器 EMMO vs App Guardian

The clearest difference is price: App Guardian at Free against 计算器 EMMO's $1.99. App Guardian also leads on update cadence (weekly vs monthly). 计算器 EMMO's advantage is in-app purchases (none vs 3) and ratings volume (20 vs 1). On rating, ads and device support there is nothing between them.

App Guardian is free to download; 计算器 EMMO costs $1.99 up front. App Guardian sells 3 in-app purchases, starting at $0.99 per 7 days. 计算器 EMMO asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 计算器 EMMO against 5.0 for App Guardian. That said, the two scores are not equally well evidenced: 计算器 EMMO has 20 ratings behind it against 1, so its average is the more settled of the two.

计算器 EMMO ships an update monthly, App Guardian weekly. The most recent releases landed on October 27, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 计算器 EMMO | App Guardian |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (20 ratings)](https://appshunter.io/ios/app/emmo/id1605744253/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/app-guardian-privacy-and-security/id6740409871/reviews)** |
| Number of ratings | **20** | 1 |
| Positive reviews | 85.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Paid** | Subscription |
| Size | 10 MB | 23 MB |
| Requires iOS | **13.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EMMO Corp.](https://appshunter.io/developer/1507868195) | [青伟 刘](https://appshunter.io/developer/1254343646) |

## What reviewers say

### 计算器 EMMO

[App page](https://appshunter.io/ios/app/emmo/id1605744253)

A professional scientific calculator with a user-friendly interface and customizable themes. It offers advanced functions beyond the standard system calculator, along with a history log for easy access to past calculations.

**Highlights:** Advanced scientific functions, Customizable themes, History log, Multiple sound effects, Smart and convenient operation

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

**In-app purchases:** none


### App Guardian

[App page](https://appshunter.io/ios/app/app-guardian-privacy-and-security/id6740409871)

Secure your device by locking apps, encrypting private media, and preventing accidental purchases. Manage children's screen time and app installations for a safer digital environment. Offers comprehensive protection for your privacy and information.

**Highlights:** App locking for social media and games, Secure vault for photos and videos, App usage statistics tracking, Uninstall prevention for important apps, Parental controls for screen time and installations, Payment locking for app stores, Accidental deletion and purchase prevention

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App Guardian & Lock (Weekly) | $0.99 | per 7 days |
| Annual Membership | $6.99 | per year |
| VIP Member | $9.99 | one-time |


## Frequently asked questions

### Is 计算器 EMMO free?

计算器 EMMO costs $1.99, with no in-app purchases.

### Is App Guardian free?

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

### Which has better reviews, 计算器 EMMO or App Guardian?

App Guardian is rated higher. 计算器 EMMO averages 5.0 out of 5 from 20 ratings, while App Guardian averages 5.0 from 1 ratings.

### Do 计算器 EMMO or App Guardian have ads?

Neither 计算器 EMMO nor App Guardian shows ads.

### Which is updated more often, 计算器 EMMO or App Guardian?

计算器 EMMO ships an update monthly, and App Guardian weekly. Most recently, 计算器 EMMO was updated on October 27, 2026 and App Guardian on September 14, 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.*