# ISRTRI vs NSC TLV

The clearest difference is update cadence: ISRTRI at weekly against NSC TLV's every 4 months. NSC TLV's advantage is iOS requirement (15.1 vs 18.6). 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.

ISRTRI ships an update weekly, NSC TLV every 4 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ISRTRI | NSC TLV |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Size | 17 MB | 50 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ran kellner](https://appshunter.io/developer/1372973121) | [Arbox LTD](https://appshunter.io/developer/1021244486) |

## What reviewers say

### ISRTRI

[App page](https://appshunter.io/ios/app/isrtri/id1546991465)

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

**In-app purchases:** none


### NSC TLV

[App page](https://appshunter.io/ios/app/nsc-tlv/id6504727973)

**In-app purchases:** none


## Frequently asked questions

### Is ISRTRI free?

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

### Is NSC TLV free?

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

### Do ISRTRI or NSC TLV have ads?

Neither ISRTRI nor NSC TLV shows ads.

### Which is updated more often, ISRTRI or NSC TLV?

ISRTRI ships an update weekly, and NSC TLV every 4 months. Most recently, ISRTRI was updated on October 29, 2026 and NSC TLV on October 25, 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.*