About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

Onlysmile
Tooth whitening gel

OnlySmile ‘s teeth whitening gel is characterized by its high quality and gentle effect, making it an effective and user-friendly product for intensive teeth whitening . The product has an attractive, flawless design. The easy and safe application of the tooth whitening gel, combined with its long-lasting effect due to its economical consumption, leaves an impressive impression. The production and development of this product took place in Germany. The OnlySmile tooth whitening gel is an accessory product for cosmetic tooth whitening and was developed as a refill product for the OnlySmile tooth whitening system, which already contains a gel tube. The gel can also be used in conjunction with teeth whitening lamps and trays from other suppliers on the market. Teeth whitening – simple, fast and uncomplicated. The application of the tooth wh itening gel is uncomplicated and safe. OnlySmile tooth whitening gel is certified and ensures a completely safe feeling and white teeth.

Advantages

✅ Easy and safe to use
✅ Made in Germany
✅ Gentle
✅ Certified

Disadvantages

❌ Initial use requires some practice

The first impression

Packaging and contents

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingNo unnecessary packaging waste was produced100 points
Package contents & scopeComplete100 points
Instructions for useClearly written in German and English100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points

The tooth whitening gel was delivered in a sturdy cardboard box that was undamaged and easy to open. The gel was packaged in a sturdy tube, which protects the product from damage and thus ensures comprehensive product protection. There was no unnecessary packaging waste. Instructions for use are available and easy to understand. This makes the product easy to use. The packaging is fully recyclable. The tooth whitening gel makes a very good impression at first glance.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceVery good visual appearance100 points
ProcessingOutstanding workmanship100 points
StabilityVery stable100 points
Sustainability of the productNo information on sustainability, but high-quality materials80 points
MiscellaneousSuitable as a gift100 points
Total96 points
Weighting: 20%
*The maximum score is 100 points
The tooth whitening gel is ready for the practical test.

The tooth whitening gel impresses with its pleasant appearance and ease of use. The robustness of the product is demonstrated by its high quality and durable finish. The workmanship is very good, with no visible defects or unclean transitions. The manufacturer has not provided any additional information regarding sustainability .

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
DesignAttractive design100 points
ApplicationThe tooth whitening gel is easy and convenient to use, which enables efficient tooth whitening. 97 points
CompatibilityGentle and well tolerated100 points
Scope of deliveryComprehensive for a wide range of applications100 points
Handling the canInitial use and dosing requires some practice. 85 points
Total96 points
Weighting: 45%
*The maximum score is 100 points

The practical test has shown that the manufacturer keeps its advertising promises regarding the use of the tooth whitening gel. The gel is easy and convenient to use and enables efficient tooth whitening. The effect should be visible after a few applications. The taste is very pleasant. The gel leaves a fresh feeling in the mouth. It is also very economical to use .
The design of the tube is simple and appealing. The tube looks professional and of high quality. This leaves a positive impression.
Initially, the application required some practice. The gel can also be used in conjunction with tooth whitening lamps and trays from other suppliers on the market . The gel removes superficial discoloration. The tooth whitening gel is particularly suitable for use at home.
The development and manufacture in Germany is very positive. The tooth whitening gel is suitable for long-term whitening results.
To summarize, the manufacturer keeps its advertising promises regarding the application, design, compatibility and quality of the tooth whitening gel. The gel enables efficient whitening. The simple and appealing design rounds off the overall picture. We have tested the teeth whitening gel from OnlySmile and found that it works very well. Whether wine, nicotine, tea, red wine or coffee – the teeth always remain protected from discoloration. The OnlySmile tooth whitening gel is a certified product for an all-round safe feeling and white teeth.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we examine how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioVery good performance in the mid-price segment80 points
Rating cut4.3 out of 5.0 on Amazon65 points
Total73 points
Weighting: 15%
*The maximum score is 100 points

On the Amazon platform, consumers rate the product with an average of 4.3 stars. There is often criticism that the effect is poor, while other customers see a good effect of the tooth whitening gel. In our practical test, we were able to confirm that differences were noticeable after the first application.

Prices of up to €62 are charged on the Internet for equivalent products. Very inexpensive products are available from as little as €17 . The tooth whitening gel from OnlySmile is therefore currently in the middle price segment with a price of €31.50. For the quality and performance received, the price-performance ratio is very good.

Overall result

WeightingScore achieved*
1. packaging & contents20%100 points
2. product processing & appearance20%96 points
3. in the practical test45%96 points
4. price/performance & consumer ratings15%73 points
Total93 points
*The maximum score is 100 points
Tooth whitening gel
 of the brand 
Onlysmile
achieved
93
Points in our test and therefore passed. The test was carried out in the test period
01/24
and is stored in our database under the licence number
240124006
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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Our product evaluations are carried out exclusively through direct, on-site tests. This ensures a detailed and specific examination of the product properties. You can find more information about the test procedure here.

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