Comparison · 18 merchant reviews read · Updated October 2026
Theme Scientist vs AB Tasty
Short answer
Pick Theme Scientist if you need theme tests.
Pick AB Tasty if you need url split tests and checkout tests and you want to start on a free plan.
 Theme Scientist |  AB Tasty | |
|---|---|---|
| App Store rating | 4★ (13) | 4.9★ (5) |
| Cost at your traffic | $29.99+/moYour traffic is above the listed limits. Tester Pro is the floor, expect a custom quote. | Free to startCheapest plan: Free (for clients). |
| How price scales | Starts at $9.99/month with a 14-day free trial, and the price goes up as your store's monthly order limit increases (50, 250, or 500 orders). | The app is free to install, but you need a separate AB Tasty account to use it, and the listing doesn't say what that costs. |
| Launched | March 5, 2020 | May 7, 2024 |
| App Store listing | App Store listing |
AB Tasty starts at $0 a month, Theme Scientist at $9.99
Theme Scientist
- Tester$9.99/mo
- Tester+$19.99/mo
- Tester Pro$29.99/mo
AB Tasty
- Free (for clients)Free
“Free to install. Additional charges may apply.”
Only Theme Scientist can run theme tests
Read from each app's listing. A dot means the listing says it can do it.
| Theme Scientist | AB Tasty | |
|---|---|---|
| Theme tests | ● | ○ |
| Content tests | ● | ● |
| URL split tests | ○ | ● |
| Checkout tests | ○ | ● |
| Personalization | ○ | ● |
| Visual editor | ○ | ● |
| Free plan | ○ | ● |
What reviewers complain about
None of these apps has 20+ reviews yet, so there's not enough to compare complaint rates.
Theme Scientist replies to 85% of reviews. AB Tasty replies to none
| Theme Scientist | AB Tasty | |
|---|---|---|
| Reviews with a developer reply | 85% | 0% |
| Praise support | 69.2% | 20% |
| Complain about support | 7.7% | 0% |
Serious problems reviewers reported
Billing disputes, broken stores, misused data and missing features. Each one is a single merchant's account.
Says its free (its not free, it just directs you to their personal page where you can pick pricing)
Results merchants put a number on
- over $50k a year revenue with Theme Scientist, testing multiple growth ideas. “increase our revenue by over $50k a year”
- double conversion rate with Theme Scientist. “double, yes double our conversion rates in 3 months”
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