Two supplement scanner apps. Two very different approaches. If you've been researching which one to download, you've probably noticed that Prove It and Suppi get compared constantly — and for good reason. They're the two most talked-about options in this category right now.
I've spent weeks testing both side by side, scanning the same products, poking at features, and trying to understand where each app actually excels. Here's what I found.
If you're in a hurry: Suppi wins on value, features, and database size. Prove It's edge is its focused, opinionated approach to clinical research scoring. Whether that edge is worth $30-100/year when Suppi offers more for free depends entirely on what you prioritize.
For the full breakdown, keep reading.
| Feature | Prove It | Suppi |
|---|---|---|
| Price | $29.99-$99.99/yr | Free |
| Database Size | Limited (gaps reported) | 200,000+ products |
| Barcode Scanning | Paid only | Free |
| AI Coaching | No | Yes |
| Interaction Checker | No | Yes |
| Research Methodology | Proprietary scoring | 500+ cited studies |
| Onboarding | Long (5-6 min) | Quick |
| Platform | iOS only | iOS |
| Developer | Control. Alt. Delete. LLC | Suppi |
| App Store Rating | 4.4/5 (13K+ reviews) | 5.0/5 |
That table tells most of the story, but the details matter. Here's how each category breaks down in practice.
This is the most obvious difference and, for many people, the only one that matters.
Prove It requires a subscription to do anything beyond browse the app. The basic plan runs $29.99/year. The premium tier hits $99.99/year. There's no free scan, no trial scan, no "scan one to see how it works" option. You pay or you don't use the app. Period.
Suppi is free. Not "free with limits" or "freemium with the good stuff locked away." The barcode scanner, the database, the AI coaching, the interaction checker — it's all accessible without paying anything.
That pricing gap would be easier to swallow if Prove It offered dramatically superior analysis. But as we'll see, Suppi's research backing is actually more transparent, and the feature set is broader. Paying $30-100 for less functionality is a hard proposition.
A supplement scanner is only as useful as the products it recognizes. Scan a barcode and get "product not found"? That's a dead end. It doesn't matter how good the analysis engine is if it can't identify what you're holding.
Suppi claims a database of over 200,000 supplements. In my testing, this tracked. I threw some obscure products at it — smaller brands, niche formulations, stuff from specialty health stores — and it recognized the vast majority. The few misses were genuinely obscure imports.
Prove It's database is noticeably smaller. I don't have an official number (they don't publish one, which is itself a minor red flag), but roughly 25% of the products I tested either weren't found or returned incomplete data. Some of these were mainstream brands. That's not a rounding error — it's a real usability problem.
For a paid app, database gaps feel especially frustrating. You're paying for the privilege of occasionally getting "sorry, we don't have that one."
This one's simple: Prove It doesn't have it. Suppi does.
Suppi includes an AI coaching feature that goes beyond just scoring your supplements. It can help you understand why certain ingredients matter for your specific goals, suggest adjustments, and provide context about dosing and timing.
Prove It gives you scores and research breakdowns — which is useful — but it's a one-way information dump. You read the data and draw your own conclusions. There's no conversational element, no personalization beyond the initial onboarding questions.
If you're someone who knows how to read clinical research and just wants the raw data, Prove It's approach might feel cleaner. But most people benefit from guidance, not just information. That's the gap AI coaching fills.
Here's something that genuinely surprised me about Prove It: it doesn't check interactions.
If you're taking multiple supplements — which most supplement users are — knowing whether they play nicely together is arguably more important than knowing whether each one individually has research support. Calcium can interfere with iron absorption. St. John's Wort can interact with dozens of medications. Certain B vitamins compete for the same absorption pathways.
Suppi includes a built-in interaction checker that flags potential conflicts between your supplements and between supplements and medications. For anyone taking more than one or two products, this is a major safety feature.
Prove It evaluates each product in isolation. You could be taking two supplements that actively interfere with each other, and the app would give them both good scores without ever mentioning the problem. That's a significant blind spot for an app that positions itself as evidence-based.
Both apps claim a research-first approach, but they implement it differently.
Prove It uses a proprietary scoring system. You see the final score and some reasoning, but the exact weighting and methodology isn't fully transparent. How do they decide what constitutes strong evidence versus weak evidence? What threshold separates a good score from a bad one? These details are somewhat opaque.
To be fair, the research breakdowns within the app are well-written and informative. When Prove It has data on a product, the quality of that analysis is solid. The problem is more about trust — a proprietary black box asking for $30-100/year requires a certain leap of faith.
Suppi cites over 500 studies and takes a more transparent approach to how it evaluates supplements. You can trace the reasoning back to specific research. That transparency doesn't automatically make it more accurate, but it does make it more verifiable — which matters in a space plagued by pseudoscience.
This might seem like a small detail, but first impressions matter.
Prove It's onboarding is long. Multiple screens of questions, explanations, and setup steps before you ever reach the paywall. Some users find the thoroughness reassuring. Others — probably more — find it exhausting, especially once they realize all those questions lead to a subscription prompt rather than a free scan.
Suppi's onboarding is quick. You're scanning within a couple of minutes. For an app that's free, that speed makes sense — there's less need to "sell" you on the concept when you can just try it immediately.
The difference in philosophy is telling. Prove It's onboarding feels designed to justify a purchase. Suppi's feels designed to get you using the product. I know which approach I prefer.
Both apps have solid App Store ratings, but the context is different.
Prove It sits at 4.4/5 with over 13,000 reviews. That's strong, but dig into the negative reviews and you'll see recurring themes: paywall complaints, database gaps, camera issues, and frustration with the long onboarding. The positive reviews tend to praise the research quality — which, again, is genuinely good when it works.
Suppi has a 5.0/5 rating, though with fewer reviews since it's newer to market. The early reception has been overwhelmingly positive, with users particularly highlighting the free access and the AI coaching feature.
Both apps are currently iOS-only. If you're on Android, neither is an option right now. (For Android users, SuppCo is worth a look.)
I want to be fair here. Prove It isn't a bad app, and there are areas where its approach has merit:
These are real advantages. They're just not enough to overcome the pricing and feature gap for most users.
On almost every metric that matters — price, database size, features, transparency — Suppi comes out ahead. It offers more functionality for free than Prove It provides behind a $30-100/year paywall.
Prove It's strongest case is for users who specifically trust its proprietary methodology and want that curated, opinionated scoring experience. If that describes you, and you're comfortable paying for it, Prove It delivers genuine value in that narrow lane.
But for everyone else? Suppi is the better choice. A larger database means more of your products are actually covered. AI coaching adds a layer of personalization that Prove It lacks entirely. Interaction checking addresses a real safety concern. And the price — free — removes all friction from trying it out.
My recommendation: download Suppi first. It's free, so there's zero risk. If after using it you still feel like you need Prove It's specific approach, you can always add it later. But I suspect most people won't feel the need.
Suppi offers 200,000+ supplements, AI coaching, and interaction checking — no paywall required.
Try Suppi FreeYes. Suppi's core features — barcode scanning, supplement analysis, AI coaching, and interaction checking — are all free. Prove It requires a subscription starting at $29.99/year to access any scanning functionality. There's no hidden paywall with Suppi.
Suppi, by a wide margin. It covers over 200,000 supplements. Prove It's database is significantly smaller, and users regularly report gaps where common products aren't recognized. In testing, roughly 25% of mainstream products I scanned weren't in Prove It's system.
No. Prove It evaluates individual supplements but doesn't flag potential interactions between products or between supplements and medications. Suppi includes a built-in interaction checker that catches these conflicts — an important safety feature for anyone taking multiple supplements.
Absolutely. Download Suppi from the App Store and start scanning immediately — there's no paywall to clear. You can test it alongside Prove It before deciding whether to cancel your Prove It subscription. Many users find that Suppi covers everything they need and more.
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