Dr. Thump Pro vs Pho Mai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Predicts watermelon sweetness
- Uses sound and size analysis
- Displays sweetness on brix scale
- Helps avoid bitter watermelons
- Includes tutorial video
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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.
Pho Mai
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The "Pho Mai" iOS app provides all the information you need to know before heading to us and deciding what you want to try today. Browse through the categories and items to pick what you crave the most.
Screenshots
Verdict
The clearest difference is price: Pho Mai at Free against Dr. Thump Pro's $1.99. Pho Mai also leads on update cadence (every 14 months vs every 39 months) and device support (3 vs 1). Dr. Thump Pro's advantage is rating (5.0 vs 1.0) and ratings volume (4 vs 1). On 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
Pho Mai 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.
Dr. Thump Pro holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Dr. Thump Pro ships an update every 39 months, Pho Mai every 14 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | Dr. Thump Pro | Pho Mai |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (4 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 39 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 40 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Cornelius | Pho Mai |
In-app purchases
Dr. Thump Pro
No in-app purchases
Pho Mai
No in-app purchases
Questions
Is Dr. Thump Pro free?
Is Pho Mai free?
Which has better reviews, Dr. Thump Pro or Pho Mai?
Do Dr. Thump Pro or Pho Mai have ads?
Which is updated more often, Dr. Thump Pro or Pho Mai?
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