# Carbon Voice vs SupplySide

The clearest difference is review sentiment: Carbon Voice at 100% against SupplySide's 0%. Carbon Voice also leads on rating (5.0 vs 3.9) and device support (3 vs 1). SupplySide's advantage is in-app purchases (none vs 12). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Carbon Voice sells 12 in-app purchases, starting at $6.99 per month. SupplySide asks for nothing beyond the download.

Carbon Voice holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 15 and 12 respectively. Written reviews point the same way: 100% of Carbon Voice's written reviews are positive against 0% of SupplySide's.

Carbon Voice ships an update every 5 days, SupplySide every 6 days. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Carbon Voice | SupplySide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (15 ratings)](https://appshunter.io/ios/app/carbon-voice-talk-async/id1567782769/reviews)** | [3.9 (12 ratings)](https://appshunter.io/ios/app/supplyside/id6478636739/reviews) |
| Number of ratings | **15** | 12 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 days |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 206 MB | 143 MB |
| Requires iOS | **15.0** | 17.4 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Phonon X Inc](https://appshunter.io/developer/1567782771) | [Informa Support Services Inc](https://appshunter.io/developer/1636025449) |

## What reviewers say

### Carbon Voice

[App page](https://appshunter.io/ios/app/carbon-voice-talk-async/id1567782769)

This app allows teams to communicate asynchronously through voice messages. It automatically transcribes, summarizes, and makes conversations searchable. Users can extract action items and integrate with over 8,000 tools.

**Highlights:** Asynchronous voice messaging, Automatic transcription, AI-powered summaries, Action item extraction, Integration with 8,000+ tools, Cross-language auto-translation, Searchable conversation history

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter + Global Voice | $6.99 | per month |
| Lite | $10.99 | per month |
| Lite + Global Voice | $16.99 | per month |
| Standard | $17.99 | per month |
| Standard + Global Voice | $23.99 | per month |
| Pro | $26.99 | per month |
| Starter + Global Voice | $69.99 | per year |
| Lite | $84.99 | per year |
| Lite + Global Voice | $149.99 | per year |
| Standard | $155.99 | per year |
| Standard + Global Voice | $219.99 | per year |
| Pro | $259.99 | per year |


### SupplySide

[App page](https://appshunter.io/ios/app/supplyside/id6478636739)

This app connects professionals in the supplement, food, and beverage industries. It facilitates networking, discovery of innovations, and collaboration to drive business forward. The digital companion streamlines event experiences with navigation, scheduling, and matchmaking features.

**Highlights:** Exhibitor list and floor plan, Interactive event schedule, Personalized agenda creation, Matchmaking for business connections, Discover ingredient and product innovations, Streamlined event navigation

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

**In-app purchases:** none


## Frequently asked questions

### Is Carbon Voice free?

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

### Is SupplySide free?

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

### Which has better reviews, Carbon Voice or SupplySide?

Carbon Voice is rated higher. Carbon Voice averages 5.0 out of 5 from 15 ratings, while SupplySide averages 3.9 from 12 ratings.

### Do Carbon Voice or SupplySide have ads?

Neither Carbon Voice nor SupplySide shows ads.

### Which is updated more often, Carbon Voice or SupplySide?

Carbon Voice ships an update every 5 days, and SupplySide every 6 days. Most recently, Carbon Voice was updated on September 10, 2026 and SupplySide on September 19, 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.*