FIRSTUDIO vs ISRTRI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FIRSTUDIO
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.
- View class schedules
- Sign up for classes
- Invite friends
- Receive notifications and news
- Renew membership
- Purchase merchandise
- Connect with members
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"Welcome to the FIRSTUDIO members app! Download our app to plan and book your fitness classes. At the click of a button, you can view class schedules, sign up for classes and even invite a friend to join you! With the app, you’ll keep in touch with FIRSTUDIO staff and coaches, receive notifications, news and reminders. After setting up your personal profile in the app, you'll be able to easily renew your membership, purchase FIRSTUDIO merchandise and connect with other FIRSTUDIO members. Download the App today! This app is powered by Arbox, the leading fitness management platform for fitness and wellness businesses. "
ISRTRI
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This app is used for: registration for triathlon events in Israel upload necessary documents for participating in events see your events history
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | FIRSTUDIO | ISRTRI |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 8 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 53 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Arbox LTD | ran kellner |
In-app purchases
FIRSTUDIO
No in-app purchases
ISRTRI
No in-app purchases
