# Key vs GramAI

The clearest difference is price: GramAI at Free against Key's $0.99. GramAI also leads on iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

GramAI is free to download; Key costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Key | GramAI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/key-tone-decoder/id6738107351/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Monetization | Paid | — |
| Size | 1 MB | 69 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) | [Ravi Kumar Singh](https://appshunter.io/developer/1833900066) |

## What reviewers say

### Key

[App page](https://appshunter.io/ios/app/key-tone-decoder/id6738107351)

This application uses your device's microphone to capture and decode dual-tone multi-frequency (DTMF) signals in real-time. It displays the decoded numbers instantly on your screen, making it a useful tool for professionals and tech enthusiasts.

**Highlights:** Real-time DTMF signal decoding, Uses device microphone, Displays decoded numbers instantly, Suitable for professionals, Useful for tech enthusiasts

**Features:** macOS Compatibility

**In-app purchases:** none


### GramAI

[App page](https://appshunter.io/ios/app/gramai/id6759402630)

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

**In-app purchases:** none


## Frequently asked questions

### Is Key free?

Key costs $0.99, with no in-app purchases.

### Is GramAI free?

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

### Do Key or GramAI have ads?

Neither Key nor GramAI shows ads.

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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.*