Comparison · 40 merchant reviews read · Updated October 2026
GemX vs CustomFit AI
Short answer
Pick GemX if you need audience targeting.
Pick CustomFit AI if you need price tests and theme tests and you want to start on a free plan.
 GemX |  CustomFit AI | |
|---|---|---|
| App Store rating | 4.8★ (25) | 5★ (20) |
| Cost at your traffic | $49+/moStarting price. The listing says price rises with revenue but gives no tiers. | $139+/moYour traffic is above the listed limits. Upto 10000 Monthly is the floor, expect a custom quote. |
| How price scales | Starts at $49/month for single-page testing, or from $99/month (up to $699) for full-funnel testing, with the Funnel plan price rising with your monthly store revenue. | Free on dev stores for a 14-day trial, then $79/month for up to 10,000 monthly visitors, or $139/month for the plan that adds AI Copilot. |
| Launched | September 23, 2024 | May 16, 2023 |
| App Store listing | App Store listing |
CustomFit AI starts at $0 a month, GemX at $49
GemX
- Page Optimize$49/mo
- Funnel Optimize$99/mo
“Starts at $99 and goes up to $699. Pricing scales based on monthly sitewide revenue.”
CustomFit AI
- Free (Dev stores)Free
- 10000 visitors/mo$79/mo
- Upto 10000 Monthly$139/mo
Only GemX can run audience targeting
Read from each app's listing. A dot means the listing says it can do it.
| GemX | CustomFit AI | |
|---|---|---|
| Price tests | ○ | ● |
| Theme tests | ○ | ● |
| Template tests | ● | ● |
| Content tests | ○ | ● |
| URL split tests | ● | ● |
| Offer tests | ● | ● |
| Checkout tests | ○ | ● |
| Personalization | ○ | ● |
| Visual editor | ○ | ● |
| AI test ideas | ○ | ● |
| Audience targeting | ● | ○ |
| Free plan | ○ | ● |
What reviewers complain about
Share of each app's reviews that complain about the topic. Apps under 20 reviews are left out because a single review swings the number.
| GemX | |
|---|---|
| Price | 0% |
| Billing and refunds | 0% |
| Support | 4.3% |
| Bugs | 4.3% |
| Setup | 0% |
| Dashboard | 0% |
| Reporting and stats | 4.3% |
| Flicker | 0% |
| Page speed | 0% |
| Integrations | 0% |
| What you can test | 0% |
| Results | 4.3% |
The most common GemX complaint: support
Tracking is inaccurate even after 24 hours. The app doesn't collect data on orders or visitors at all. I wasted two days testing only to see results that make no sense and don't match reality. Support doesn't exist. The support app itself doesn't even work. No way to get help, no responses, nothing. Stay away from this app.
GemX replies to 44% of reviews. CustomFit AI replies to none
| GemX | CustomFit AI | |
|---|---|---|
| Reviews with a developer reply | 44% | 0% |
| Praise support | 73.9% | 64.7% |
| Complain about support | 4.3% | 0% |
Serious problems reviewers reported
Billing disputes, broken stores, misused data and missing features. Each one is a single merchant's account.
Tracking is inaccurate even after 24 hours. The app doesn't collect data on orders or visitors at all. I wasted two days testing only to see results that make no sense and don't match reality. Support doesn't exist. The support app itself doesn't even work. No way to get help, no responses, nothing. Stay away from this app.
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