# GPS SERVER SYSTEM vs True CallerID

The clearest difference is in-app purchases: GPS SERVER SYSTEM at none against True CallerID's 8. True CallerID's advantage is update cadence (fortnightly vs every 22 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. True CallerID sells 8 in-app purchases, starting at $3.99 per 7 days. GPS SERVER SYSTEM asks for nothing beyond the download.

GPS SERVER SYSTEM ships an update every 22 months, True CallerID fortnightly. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | GPS SERVER SYSTEM | True CallerID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (274 ratings)](https://appshunter.io/ios/app/true-callerid-spam-blocker/id6744879291/reviews)** |
| Number of ratings | — | **274** |
| Positive reviews | — | 57.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 84 MB | 141 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tamilarasan Kannan](https://appshunter.io/developer/1500116258) | [Reena Williams](https://appshunter.io/developer/1708538764) |

## What reviewers say

### GPS SERVER SYSTEM

[App page](https://appshunter.io/ios/app/gps-server-system/id6447580360)

**Features:** macOS Compatibility

**In-app purchases:** none


### True CallerID

[App page](https://appshunter.io/ios/app/true-callerid-spam-blocker/id6744879291)

Identify unknown callers and block unwanted calls automatically. This app uses smart spam detection and AI to protect you from robocalls, telemarketers, and scams. Take control of your phone and see caller information before you answer.

**Highlights:** Instant Caller ID, Smart Call Blocker, Spam Detection Alerts, Call Log Insights, Number Lookup, Personalized Block List

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Weekly Plan with Free Trial | $5.99 | per 7 days |
| Yearly 60% discount Plan | $29.99 | per year |
| Yearly Subscriptions | $39.99 | per year |
| Duplicate Contact Remover | $3.99 | one-time |
| Sync Google Contacts | $4.99 | one-time |
| Hide Information | $9.99 | one-time |
| Lifetime validity | $59.99 | one-time |


## Frequently asked questions

### Is GPS SERVER SYSTEM free?

GPS SERVER SYSTEM is free to download, with no in-app purchases.

### Is True CallerID free?

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

### Do GPS SERVER SYSTEM or True CallerID have ads?

Neither GPS SERVER SYSTEM nor True CallerID shows ads.

### Which is updated more often, GPS SERVER SYSTEM or True CallerID?

GPS SERVER SYSTEM ships an update every 22 months, and True CallerID fortnightly. Most recently, GPS SERVER SYSTEM was updated on October 19, 2026 and True CallerID on October 16, 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.*