# ASTROTIMER vs CallAlert

The clearest difference is ads: CallAlert at none against ASTROTIMER's shown. ASTROTIMER's advantage is update cadence (every 6 days vs every 5 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. ASTROTIMER sells 1 one-off in-app purchase and CallAlert sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ASTROTIMER ships an update every 6 days, CallAlert every 5 weeks. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ASTROTIMER | CallAlert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Size | 6 MB | 83 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takashi Tsunoda](https://appshunter.io/developer/1884742586) | [Somedea LLC](https://appshunter.io/developer/6799287083) |

## What reviewers say

### ASTROTIMER

[App page](https://appshunter.io/ios/app/astrotimer/id6761328042)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### CallAlert

[App page](https://appshunter.io/ios/app/callalert-emergency-sos/id6809305713)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $2.99 | per month |
| Pro Monthly | $5.99 | per month |
| Plus Annual | $29.99 | per year |
| Pro Annual | $59.99 | per year |


## Frequently asked questions

### Is ASTROTIMER free?

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

### Is CallAlert free?

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

### Do ASTROTIMER or CallAlert have ads?

ASTROTIMER shows ads; CallAlert does not.

### Which is updated more often, ASTROTIMER or CallAlert?

ASTROTIMER ships an update every 6 days, and CallAlert every 5 weeks. Most recently, ASTROTIMER was updated on October 25, 2026 and CallAlert on October 29, 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.*