Comparison

Dr. Thump Pro vs Surf Bar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dr. Thump Pro

This app analyzes the sound of thumping a watermelon, combined with its size, to predict its sweetness level on a brix scale. It aims to help users select quality watermelons and avoid bitter ones before purchasing.

Highlights
  • Predicts watermelon sweetness
  • Uses sound and size analysis
  • Displays sweetness on brix scale
  • Helps avoid bitter watermelons
  • Includes tutorial video
Features
Read full description

How many times have you gone to the store, selected a watermelon, and then taken it home only to find out it was not very good? Dr. Thump Pro is an app that has been developed after years of research to take the randomness out of the process of selecting a quality watermelon of any type. By using the sound made from thumping a watermelon along with its general size, the app can predict the general level of sweetness or bitterness of the watermelon before purchase. When using the app, the sweetness or bitterness of the watermelon will be displayed using a brix scale, which is designed to measure the sugar content in fruit juices. The lower the number, the more bitter the watermelon. The higher the number, the sweeter and less bitter. A typical watermelon is a 7 on this scale. Ideally, you are looking for values of 8 and above. For anything less than a 7, we recommend putting it back as it will be bitter tasting. When using the app, watermelons can be situated in a bin or removed and tested in isolation. When thumping, you can use your knuckles or fist. For a lot of testing to save your knuckles, we recommend something hard and solid, such as a cue ball or hard plastic disk (as in a caster wheel). Whatever the object, it should not make a noise itself—such as a ringing or clanking sound—after you thump the watermelon. A tutorial video on using this app can be found here: https://youtu.be/L7y10r6bS0Q. This video can also be accessed anytime through the tutorial option in the settings menu.

About

Surf Bar

Easily locate nearby shops, browse the menu, and place orders for your favorite acai bowls and smoothies. Track your loyalty points and rewards status to make your next purchase even more rewarding. Enjoy convenient ordering ahead for a quick and satisfying experience.

Highlights
  • Find nearest locations
  • View menu
  • Place orders ahead
  • Check rewards status
  • Earn loyalty points
Features
Read full description

This app allows you to find your nearest Surf Bar location, view our menu, check your rewards status, and place an order. Make getting your favorite items easy and convenient by ordering ahead. Earn loyalty points and track your rewards status in the app. We can't wait to serve you at your favorite local açaí and smoothie shop!

Screenshots

Dr. Thump Pro4 screens
Surf Bar2 screens

Verdict

The call

The clearest difference is price: Surf Bar at Free against Dr. Thump Pro's $1.99. Surf Bar also leads on update cadence (fortnightly vs every 39 months) and ratings volume (21 vs 4). On rating, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Surf Bar is free to download; Dr. Thump Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Dr. Thump Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Surf Bar has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Dr. Thump Pro ships an update every 39 months, Surf Bar fortnightly. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
Dr. Thump Pro versus Surf Bar: the parameters behind the verdict, then further details
ParameterDr. Thump ProSurf Bar
Price$1.99Free — better
Rating5.0 (4 ratings) — better4.8 (21 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings421 — better
Update frequencyEvery 39 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size40 MB109 MB
Age rating4+4+
DeveloperKevin CorneliusSurf Bar

Customer experience

Dr. Thump Pro

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Surf Bar

All ratings21 ratings
Positive95.2%
Neutral0.0%
Negative4.8%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Dr. Thump Pro

No in-app purchases

None

Surf Bar

No in-app purchases

Questions

Is Dr. Thump Pro free?
Dr. Thump Pro costs $1.99, with no in-app purchases.
Is Surf Bar free?
Surf Bar is free to download, with no in-app purchases.
Which has better reviews, Dr. Thump Pro or Surf Bar?
Dr. Thump Pro is rated higher. Dr. Thump Pro averages 5.0 out of 5 from 4 ratings, while Surf Bar averages 4.8 from 21 ratings.
Do Dr. Thump Pro or Surf Bar have ads?
Neither Dr. Thump Pro nor Surf Bar shows ads.
Which is updated more often, Dr. Thump Pro or Surf Bar?
Dr. Thump Pro ships an update every 39 months, and Surf Bar fortnightly. Most recently, Dr. Thump Pro was updated on October 24, 2026 and Surf Bar on October 24, 2026.

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