Dr JB vs Sales Growth Engine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dr JB
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Inside the Dr JB app, you can: Access all of your videos in one easy to use app Receive push notifications with the latest news and updates Access to all of your videos without having to remember your password Save your favorite posts so you can quickly find them later END USER LICENSE AGREEMENT https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Sales Growth Engine
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Inside the Sales Growth Engine app, you can: Access all of your videos in one easy to use app Receive push notifications with the latest news and updates Access to all of your videos without having to remember your password Save your favorite posts so you can quickly find them later END USER LICENSE AGREEMENT https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
Dr JB and Sales Growth Engine are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Dr JB ships an update fortnightly, Sales Growth Engine every 3 weeks. Both last shipped on October 25, 2026.
| Parameter | Dr JB | Sales Growth Engine |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 | 16.6 |
| Further details — not scored | ||
| Size | 48 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Chase Harrison | Emily Sudduth |
In-app purchases
Dr JB
No in-app purchases
Sales Growth Engine
No in-app purchases
Questions
Is Dr JB free?
Is Sales Growth Engine free?
Do Dr JB or Sales Growth Engine have ads?
Which is updated more often, Dr JB or Sales Growth Engine?
Other comparisons
