# Prism vs Interstate

The clearest difference is in-app purchases: Interstate at none against Prism's 2. Interstate also leads on device support (3 vs 1). Prism's advantage is update cadence (fortnightly vs every 3 months) and iOS requirement (17.0 vs 26.0). On price and ads there is nothing between them.

Both are free to download. Prism sells 2 in-app purchases, starting at $4.99 per year. Interstate asks for nothing beyond the download.

Prism ships an update fortnightly, Interstate every 3 months. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Prism | Interstate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (9 ratings)](https://appshunter.io/ios/app/prism-focus-and-screen-time/id6740268334/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Freemium | — |
| Size | 484 MB | 5 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [DEVSONICS (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/1788182508) | [Ciaran Mulholland](https://appshunter.io/developer/1546840688) |

## What reviewers say

### Prism

[App page](https://appshunter.io/ios/app/prism-focus-and-screen-time/id6740268334)

This app helps you build healthier phone habits by setting personalized screen time limits, blocking distractions, and tracking your usage. It offers customizable focus sessions and routines to boost productivity and encourage mindful digital wellness.

**Highlights:** Personalized screen time limits, Deep Focus sessions to block interruptions, Screen time and usage tracking, Customizable work/study routines, Block Lists and Allow Lists, Quick start and chained sessions, Scheduled healthy breaks

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $4.99 | per year |
| LifeTime Access | $19.99 | one-time |


### Interstate

[App page](https://appshunter.io/ios/app/interstate-journaling-todo/id6761027181)

**In-app purchases:** none


## Frequently asked questions

### Is Prism free?

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

### Is Interstate free?

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

### Do Prism or Interstate have ads?

Neither Prism nor Interstate shows ads.

### Which is updated more often, Prism or Interstate?

Prism ships an update fortnightly, and Interstate every 3 months. Most recently, Prism was updated on November 8, 2026 and Interstate on November 9, 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.*