Comparison · 19 merchant reviews read · Updated October 2026
Theme Scientist vs syncX
Short answer
Pick Theme Scientist if you need theme tests.
Pick syncX if you need price tests and you want to start on a free plan.
 Theme Scientist |  syncX | |
|---|---|---|
| App Store rating | 4★ (13) | 5★ (6) |
| 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. |
| 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). | Free to start, then $10.99 to $27.99/month depending on how many A/B tests and variants you need, not on your traffic or sales. |
| Launched | March 5, 2020 | October 3, 2023 |
| App Store listing | App Store listing |
syncX 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
syncX
- FreeFree
- Basic$10.99/mo
- Premium$17.99/mo
- Enterprise$27.99/mo
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 | syncX | |
|---|---|---|
| Price tests | ○ | ● |
| Theme tests | ● | ○ |
| Content tests | ● | ● |
| 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. syncX replies to none
| Theme Scientist | syncX | |
|---|---|---|
| Reviews with a developer reply | 85% | 0% |
| Praise support | 69.2% | 16.7% |
| Complain about support | 7.7% | 0% |
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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