# Calbeer vs Doctor Shield

The clearest difference is in-app purchases: Calbeer at none against Doctor Shield's 4. Calbeer also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.5). Doctor Shield's advantage is update cadence (every 6 days vs every 3 weeks). On price and ads there is nothing between them.

Both are free to download. Doctor Shield sells 4 in-app purchases, starting at $7.99 per 7 days. Calbeer asks for nothing beyond the download.

Calbeer ships an update every 3 weeks, Doctor Shield every 6 days. The most recent releases landed on September 11, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | Calbeer | Doctor Shield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (12 ratings)](https://appshunter.io/ios/app/doctor-shield-security-boost/id6736618922/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 87.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 53 MB |
| Requires iOS | **15.6** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [HIROYUKI TSUJI](https://appshunter.io/developer/1527877075) | [Raven Panna](https://appshunter.io/developer/1765725341) |

## What reviewers say

### Calbeer

[App page](https://appshunter.io/ios/app/calbeer/id6450165260)

**In-app purchases:** none


### Doctor Shield

[App page](https://appshunter.io/ios/app/doctor-shield-security-boost/id6736618922)

Optimize your iPhone's battery life and performance with this utility app. Analyze battery status, estimate usage time, and receive personalized tips to extend your device's lifespan and maintain its health.

**Highlights:** Analyze battery status and lifespan, Estimate remaining usage time, Receive energy-saving tips, Device maintenance checklist, Monitor app energy consumption

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekabonnement | $7.99 | per 7 days |
| Week proefabonnement | $7.99 | per 7 days |
| Weekabonnement | $9.99 | per 7 days |
| Week proefabonnement | $9.99 | per 7 days |


## Frequently asked questions

### Is Calbeer free?

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

### Is Doctor Shield free?

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

### Do Calbeer or Doctor Shield have ads?

Neither Calbeer nor Doctor Shield shows ads.

### Which is updated more often, Calbeer or Doctor Shield?

Calbeer ships an update every 3 weeks, and Doctor Shield every 6 days. Most recently, Calbeer was updated on September 11, 2026 and Doctor Shield on August 12, 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.*