# Open Polytechnic Library vs SUTT App

The clearest difference is update cadence: SUTT App at every 5 months against Open Polytechnic Library's every 43 months. SUTT App also leads on iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Open Polytechnic Library ships an update every 43 months, SUTT App every 5 months. Both last shipped on September 30, 2026.

## The numbers

| Metric | Open Polytechnic Library | SUTT App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (19 ratings)](https://appshunter.io/ios/app/sutt-app/id6448287425/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 5 months** |
| Monetization | — | Free |
| Size | 43 MB | 84 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Stacks Inc.](https://appshunter.io/developer/1275752393) | [Taniela Mafileo](https://appshunter.io/developer/1630288368) |

## What reviewers say

### Open Polytechnic Library

[App page](https://appshunter.io/ios/app/open-polytechnic-library/id6443709955)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### SUTT App

[App page](https://appshunter.io/ios/app/sutt-app/id6448287425)

Access a collection of hymns and songs on your mobile device. Search, save, and share your favorite hymns. Features day/night mode and includes Hiva Usu songs.

**Highlights:** Search hymns by number or title, Save favorite hymns, Share hymns online, Day and Night Mode, Includes Hiva Usu songs, Offline hymn access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Open Polytechnic Library free?

Open Polytechnic Library is free to download, with no in-app purchases.

### Is SUTT App free?

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

### Do Open Polytechnic Library or SUTT App have ads?

Neither Open Polytechnic Library nor SUTT App shows ads.

### Which is updated more often, Open Polytechnic Library or SUTT App?

Open Polytechnic Library ships an update every 43 months, and SUTT App every 5 months. Most recently, Open Polytechnic Library was updated on September 30, 2026 and SUTT App on September 30, 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.*