# Photonics Solar vs DeepChat

The clearest difference is in-app purchases: Photonics Solar at none against DeepChat's 3. Photonics Solar also leads on iOS requirement (13.4 vs 15.6). DeepChat's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. DeepChat sells 3 in-app purchases, starting at $6.99 per 7 days. Photonics Solar asks for nothing beyond the download.

Photonics Solar ships an update every 3 weeks, DeepChat every 2 days. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Photonics Solar | DeepChat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 56 MB | 39 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [Viyatek](https://appshunter.io/developer/1431548762) |

## What reviewers say

### Photonics Solar

[App page](https://appshunter.io/ios/app/photonics-solar/id1558659068)

**Features:** macOS Compatibility

**In-app purchases:** none


### DeepChat

[App page](https://appshunter.io/ios/app/deepchat-ai-assistant/id6446995776)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $6.99 | per 7 days |
| Quarterly Subscription | $24.99 | per 3 months |
| Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is Photonics Solar free?

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

### Is DeepChat free?

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

### Do Photonics Solar or DeepChat have ads?

Neither Photonics Solar nor DeepChat shows ads.

### Which is updated more often, Photonics Solar or DeepChat?

Photonics Solar ships an update every 3 weeks, and DeepChat every 2 days. Most recently, Photonics Solar was updated on October 6, 2026 and DeepChat on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*