# Grumpy Old Tech Robot Control vs Voice Changer AI Modifier Pro

The clearest difference is in-app purchases: Grumpy Old Tech Robot Control at none against Voice Changer AI Modifier Pro's 7. Grumpy Old Tech Robot Control also leads on iOS requirement (10.3 vs 15.1). Voice Changer AI Modifier Pro's advantage is update cadence (every 2 months vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. Voice Changer AI Modifier Pro sells 7 in-app purchases, starting at $4.99 per 7 days. Grumpy Old Tech Robot Control asks for nothing beyond the download.

Grumpy Old Tech Robot Control ships an update every 9 months, Voice Changer AI Modifier Pro every 2 months. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Grumpy Old Tech Robot Control | Voice Changer AI Modifier Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (149 ratings)](https://appshunter.io/ios/app/voice-changer-ai-modifier-pro/id6473547805/reviews)** |
| Number of ratings | — | **149** |
| Positive reviews | — | 16.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 14 MB | 33 MB |
| Requires iOS | **10.3** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Inzant Australia PTY LTD](https://appshunter.io/developer/1491875116) | [Meteor AI Apps & Games](https://appshunter.io/developer/1709375091) |

## What reviewers say

### Grumpy Old Tech Robot Control

[App page](https://appshunter.io/ios/app/grumpy-old-tech-robot-control/id1379828627)

**In-app purchases:** none


### Voice Changer AI Modifier Pro

[App page](https://appshunter.io/ios/app/voice-changer-ai-modifier-pro/id6473547805)

Transform your voice with a variety of entertaining models. Record your audio or type text to generate unique sound clips. Share your creations easily with friends across social platforms.

**Highlights:** AI voice transformation, Record and modify audio, Text-to-speech with chosen voices, Diverse voice models, Seamless social sharing, User-friendly interface

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Weekly Subscription (Trial) | $5.99 | per 7 days |
| Weekly Premium | $6.99 | per 7 days |
| Monthly Subscription | $9.99 | per month |
| Monthly Subscription | $9.99 | per month |
| Monthly Subscription (Trial) | $12.99 | per month |
| Monthly Premium | $12.99 | per month |


## Frequently asked questions

### Is Grumpy Old Tech Robot Control free?

Grumpy Old Tech Robot Control is free to download, with no in-app purchases.

### Is Voice Changer AI Modifier Pro free?

Voice Changer AI Modifier Pro is free to download, with in-app purchases available.

### Do Grumpy Old Tech Robot Control or Voice Changer AI Modifier Pro have ads?

Neither Grumpy Old Tech Robot Control nor Voice Changer AI Modifier Pro shows ads.

### Which is updated more often, Grumpy Old Tech Robot Control or Voice Changer AI Modifier Pro?

Grumpy Old Tech Robot Control ships an update every 9 months, and Voice Changer AI Modifier Pro every 2 months. Most recently, Grumpy Old Tech Robot Control was updated on September 10, 2026 and Voice Changer AI Modifier Pro on September 22, 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.*