# TKController vs SDRFE Spectrum Analyser

The clearest difference is ads: SDRFE Spectrum Analyser at none against TKController's shown. SDRFE Spectrum Analyser also leads on update cadence (every 9 days vs every 11 months). TKController's advantage is iOS requirement (11.0 vs 18.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TKController ships an update every 11 months, SDRFE Spectrum Analyser every 9 days. Both last shipped on October 15, 2026.

## The numbers

| Metric | TKController | SDRFE Spectrum Analyser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8 ratings)](https://appshunter.io/ios/app/tkcontroller/id601959183/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 13 MB | 4 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dave White](https://appshunter.io/developer/474902979) | [XionLogic Limited](https://appshunter.io/developer/1855294139) |

## What reviewers say

### TKController

[App page](https://appshunter.io/ios/app/tkcontroller/id601959183)

This utility app simplifies the control of GPS tracker devices by generating SMS messages for commands. It supports various TK-series trackers and similar devices, allowing users to manage features like geo-fencing, shock alerts, and location tracking.

**Highlights:** SMS message generation for tracker commands, Geo-fencing and stockade area alerts, Shock and movement detection notifications, Configurable position update frequency, Device status monitoring (battery, GPS, GSM), Remote engine disable function

**Features:** macOS Compatibility

**In-app purchases:** none


### SDRFE Spectrum Analyser

[App page](https://appshunter.io/ios/app/sdrfe-spectrum-analyser/id6758634671)

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

**In-app purchases:** none


## Frequently asked questions

### Is TKController free?

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

### Is SDRFE Spectrum Analyser free?

SDRFE Spectrum Analyser is free to download, with no in-app purchases.

### Do TKController or SDRFE Spectrum Analyser have ads?

TKController shows ads; SDRFE Spectrum Analyser does not.

### Which is updated more often, TKController or SDRFE Spectrum Analyser?

TKController ships an update every 11 months, and SDRFE Spectrum Analyser every 9 days. Most recently, TKController was updated on October 15, 2026 and SDRFE Spectrum Analyser on October 15, 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.*