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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryArts, Culture & RecreationLeisure FacilitiesJonaGrünfeld Fitness GmbH
Grünfeld Fitness GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Grünfeld Fitness GmbH provides fitness services and personal training at the GF Sportcenter. Coaches from the FNH Studio Group deliver holistic training focused on balance, endurance, strength, mobility, nutrition and mental wellbeing, and cooperate with Physiotherapie Rosenklinik.

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Offering

Products & services

Industry:Leisure Facilities
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4.3/5

Grünfeld Fitness GmbH

✓ Offered12
Tennis courts
3 indoor courts and 5 outdoor courts with online reservations, season and single prices; opening hours daily from 08:00 to 22:00.
Padel courts
2 outdoor padel courts with online reservations, single and subscription prices; opening hours daily from 08:00 to 22:00.
Badminton courts
4 indoor courts with online reservations, single tickets, packs of 10 and season subscriptions; opening hours daily from 08:00 to 22:00.
Squash courts
2 squash courts with online reservations, single tickets, packs of 10 and season subscriptions; opening hours daily from 08:00 to 22:15.
Fitness
Fitness area with training equipment and holistic personal training; focus on balance, endurance, strength, mobility, nutrition and mental wellbeing.
Physiotherapy
Physiotherapy with expert advice, training equipment and therapeutic training for medical purposes; collaboration with the Rosenklinik Rapperswil am See.
Restaurant
Restaurant with sun terrace and winter garden, daily menus, Italian specialities, pizzas and options for family celebrations.
Tennis school
Tennis school for lessons and supervision in tennis; listed on the Tennis page as a separate sub-offer.
Padel school
Padel school with support and training to improve your padel game; mentioned on the Padel page as a sub-offer.
Racket stringing service
Racket stringing service with advice from a specialist; offered as a professional service for sports operations.
Sports shop
Shop with clothing, shoes, rackets and accessories for tennis, padel, squash and badminton.
CAMP4you
Multi-sport holiday camp for children and young people aged 5 to 14, with a week of sport, games and fun.
Trust & reputation

ranQ Trust Score of Grünfeld Fitness GmbH: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Grünfeld Fitness GmbH scores 80.4 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.69.724%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.100.010%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.88.08%
Grünfeld Fitness GmbH scores 73.9 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.70.212%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Grünfeld Fitness GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Grünfeld Fitness GmbH scores 57.1 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.57.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grünfeld Fitness GmbH reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.4 out of 5 stars from 147 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.4
of 5

Aggregated from 147 reviews across all connected sources

Sources
GGoogle4.4147
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Location

Grünfeldstrasse 20
8645 Jona
Opening hours
Mon
08:00 - 22:00
Tue
08:00 - 22:00
Wed
08:00 - 22:00
Thu
08:00 - 22:00
Fri
08:00 - 22:00
Sat
08:00 - 22:00
Sun
08:00 - 22:00

At a glance

Legal form
Limited Liability Company
UID
CHE-318.657.968
Founded
2020 · 6 years
Last commercial register change
December 24, 2020
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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