# FIRSTUDIO vs ISRTRI

The clearest difference is update cadence: ISRTRI at weekly against FIRSTUDIO's every 8 months. FIRSTUDIO's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.6). On price, ads and in-app purchases there is nothing between them.

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

FIRSTUDIO ships an update every 8 months, ISRTRI weekly. The most recent releases landed on September 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | FIRSTUDIO | ISRTRI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/firstudio/id1313778618/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | Free | — |
| Size | 53 MB | 17 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Arbox LTD](https://appshunter.io/developer/1021244486) | [ran kellner](https://appshunter.io/developer/1372973121) |

## What reviewers say

### FIRSTUDIO

[App page](https://appshunter.io/ios/app/firstudio/id1313778618)

Plan and book fitness classes, view schedules, and invite friends. Stay connected with staff, receive notifications, and manage your membership. Purchase merchandise and connect with other members.

**Highlights:** View class schedules, Sign up for classes, Invite friends, Receive notifications and news, Renew membership, Purchase merchandise, Connect with members

**Features:** macOS Compatibility

**In-app purchases:** none


### ISRTRI

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

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

**In-app purchases:** none


## Frequently asked questions

### Is FIRSTUDIO free?

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

### Is ISRTRI free?

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

### Do FIRSTUDIO or ISRTRI have ads?

Neither FIRSTUDIO nor ISRTRI shows ads.

### Which is updated more often, FIRSTUDIO or ISRTRI?

FIRSTUDIO ships an update every 8 months, and ISRTRI weekly. Most recently, FIRSTUDIO was updated on September 15, 2026 and ISRTRI on October 2, 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.*