# Schultz vs Interval Flow

The clearest difference is ads: Interval Flow at none against Schultz's shown. Interval Flow also leads on update cadence (every 2 weeks vs every 4 weeks). Schultz's advantage is iOS requirement (12.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

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

Schultz ships an update every 4 weeks, Interval Flow every 2 weeks. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Schultz | Interval Flow |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 8 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tsutomu Koyachi](https://appshunter.io/developer/413497532) | [Tegyaan](https://appshunter.io/developer/1711584632) |

## What reviewers say

### Schultz

[App page](https://appshunter.io/ios/app/schultz/id6451004801)

This app helps you improve your speed reading skills by engaging you in a number-tapping game. Track your progress and aim for higher scores to enhance your reading efficiency.

**Highlights:** Broaden field of view, Improve speed reading, Number tapping game, Track time and score, Ascending number order challenge

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Month | $1.99 | per month |
| Pro Year | $19.99 | per year |


### Interval Flow

[App page](https://appshunter.io/ios/app/interval-flow/id6469113776)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multiple Programs | $3.99 | one-time |


## Frequently asked questions

### Is Schultz free?

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

### Is Interval Flow free?

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

### Do Schultz or Interval Flow have ads?

Schultz shows ads; Interval Flow does not.

### Which is updated more often, Schultz or Interval Flow?

Schultz ships an update every 4 weeks, and Interval Flow every 2 weeks. Most recently, Schultz was updated on September 16, 2026 and Interval Flow on September 23, 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.*