# ALPDF vs Flow Interval

The clearest difference is ads: Flow Interval at none against ALPDF's shown. ALPDF's advantage is update cadence (every 2 weeks vs every 3 months) and iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. ALPDF sells 2 in-app purchases, starting at $1.49 per month and Flow Interval sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ALPDF ships an update every 2 weeks, Flow Interval every 3 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ALPDF | Flow Interval |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7 ratings)](https://appshunter.io/ios/app/alpdf-pdf-converter-and-editor/id6738806904/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 47.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 372 MB | 1 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ESTsoft corp.](https://appshunter.io/developer/381659603) | [Takumi Kanaya](https://appshunter.io/developer/1852755878) |

## What reviewers say

### ALPDF

[App page](https://appshunter.io/ios/app/alpdf-pdf-converter-and-editor/id6738806904)

Edit, view, and convert PDF files on your mobile device with a comprehensive suite of tools. Features include text editing, merging, splitting, and AI-powered summarization and chat for quick document analysis. Secure your files with password protection and watermarks.

**Highlights:** PDF viewer and editor, Merge and split PDFs, Convert between PDF and other formats, AI PDF summarizer and chat, Password protection and watermarks, OneDrive cloud integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.49 | per month |
| Annual Subscription | $14.99 | per year |


### Flow Interval

[App page](https://appshunter.io/ios/app/flow-interval/id6757172069)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Large Tip | $8.99 | one-time |


## Frequently asked questions

### Is ALPDF free?

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

### Is Flow Interval free?

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

### Do ALPDF or Flow Interval have ads?

ALPDF shows ads; Flow Interval does not.

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

ALPDF ships an update every 2 weeks, and Flow Interval every 3 months. Most recently, ALPDF was updated on October 30, 2026 and Flow Interval on October 28, 2026.

---

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