# Chat Go AI vs Sphere

Chat Go AI and Sphere are too close to call on the numbers: across 5 compared parameters — price, update cadence, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Chat Go AI sells 3 in-app purchases, starting at $9.99 per 7 days and Sphere sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Chat Go AI ships an update every 4 weeks, Sphere every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Chat Go AI | Sphere |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Size | 83 MB | 57 MB |
| Requires iOS | **15.2** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Pavlo Stupak](https://appshunter.io/developer/1685492130) | [Rajesh Cherukuri](https://appshunter.io/developer/6781198482) |

## What reviewers say

### Chat Go AI

[App page](https://appshunter.io/ios/app/chat-go-ai/id6448667381)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $9.99 | per 7 days |
| Monthly Pro Tariff | $24.99 | per month |
| Yearly Pro Tariff | $89.99 | per year |


### Sphere

[App page](https://appshunter.io/ios/app/sphere-multi-model-ai-chat/id6781198480)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sphere Pro: Compare AI Models | $7.99 | per month |
| Sphere Pro: Multi AI Copilot | $54.99 | per year |


## Frequently asked questions

### Is Chat Go AI free?

Chat Go AI is free to download, with in-app purchases available.

### Is Sphere free?

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

### Which is updated more often, Chat Go AI or Sphere?

Chat Go AI ships an update every 4 weeks, and Sphere every 3 weeks. Most recently, Chat Go AI was updated on October 25, 2026 and Sphere on October 25, 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.*