# Chris.ai vs NanoBattery

The clearest difference is in-app purchases: NanoBattery at none against Chris.ai's 1. NanoBattery also leads on iOS requirement (17.6 vs 27.0). Chris.ai's advantage is device support (5 vs 3). On price and ads there is nothing between them.

Both are free to download. Chris.ai sells 1 one-off in-app purchase. NanoBattery asks for nothing beyond the download.

## The numbers

| Metric | Chris.ai | NanoBattery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 1.2 GB | 16 MB |
| Requires iOS | 27.0 | **17.6** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [John Veloza](https://appshunter.io/developer/662776811) | [Giovanni Outerleys](https://appshunter.io/developer/1557846953) |

## What reviewers say

### Chris.ai

[App page](https://appshunter.io/ios/app/chrisai/id6737212962)

**Features:** Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chris.ai Pro | $14.99 | one-time |


### NanoBattery

[App page](https://appshunter.io/ios/app/nanobattery/id6756941302)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chris.ai free?

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

### Is NanoBattery free?

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

### Do Chris.ai or NanoBattery have ads?

Neither Chris.ai nor NanoBattery 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.*