# Prism vs TaoFast

The clearest difference is iOS requirement: TaoFast at 15.0 against Prism's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Prism sells 1 in-app purchase, starting at $1.99 per month and TaoFast sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Prism | TaoFast |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | — |
| Size | 3 MB | 50 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [剑炜 陈](https://appshunter.io/developer/1868267178) | [召 陈](https://appshunter.io/developer/1856941752) |

## What reviewers say

### Prism

[App page](https://appshunter.io/ios/app/prism-sunlight-tracker/id6758259341)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prism Premium (Monthly) | $1.99 | per month |


### TaoFast

[App page](https://appshunter.io/ios/app/taofast/id6760482845)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TaoFast Pro | $3.99 | per month |
| TaoFast Pro | $39.99 | per year |


## Frequently asked questions

### Is Prism free?

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

### Is TaoFast free?

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

### Do Prism or TaoFast have ads?

Neither Prism nor TaoFast 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.*