Editorial · 2026 Ranking

The best supplement tracker apps of 2026, ranked.

Five iOS apps worth considering, ranked by data transparency, drug interaction checking, and honest pricing — with honest trade-offs for each.

See the ranking

Context

The state of supplement trackers in 2026

77% of American adults take supplements. Five iOS apps in 2026 are worth considering.

The category has been plagued by dark-pattern paywalls (Prove It currently has 83% 1-star reviews on recent submissions) and opaque proprietary scoring systems. The ranking below weights transparency, drug interaction checking, and honest pricing heavily.

Full disclosure: we make one of the apps on this list — StackSnap, ranked first. We've tried to be honest about where competitors win. Email loveykovl@gmail.com if you spot inaccuracies.

Ranking criteria

Data transparency & source verifiability (30%) — NIH DSLD vs proprietary databases, sourceable ingredient data, no opaque "TrustScores"
Drug interaction checking (25%) — RxNav integration, prescription handling, interaction severity flagging
Honest pricing & free trial (20%) — quiz-free onboarding, transparent subscription terms, easy cancellation
Feature depth (15%) — savings counter, doctor PDF, smart reminders, multi-marketplace pricing, HealthKit
User satisfaction signals (10%) — recent review sentiment, weighted toward last 90 days

The ranking

Best supplement tracker apps — 2026

StackSnap — Best for honest tracking with drug interaction checks

Best for: users on prescription medications who want supplement interaction checking, wellness enthusiasts tracking complex stacks who want dollar savings instead of scores, anyone who's been burned by dark-pattern supplement apps and wants an honest 7-day free trial.

StackSnap leads on three features no other consumer supplement tracker matches: a dollar savings counter (quantifies money saved monthly via duplicates avoided, overdoses caught, cheaper alternatives identified, low-evidence supplements flagged), RxNav-powered drug interaction checks (same database pharmacists use), and NIH DSLD source-verifiable ingredient data (no proprietary TrustScores — every data point traces back to a public government database entry). Plus a doctor-ready 1-page PDF export, multi-marketplace pricing across iHerb/Amazon/Vitacost, and a 7-day free trial without quiz-before-paywall dark patterns.

4.78★ · 9 ratings · $4.99/wk or $39.99/yr · 7-day full Pro trial · iOS 17+

Where it loses: smallest review base in the top 3 (9 vs 18,780 for SuppCo), iOS 17+ requirement excludes older iPhones, English-only at launch.

What users praise in reviews: "First app that actually showed me which supplements I was wasting money on." "The interaction checker flagged my fish oil + Eliquis combination — saved me a hospital visit." "Honest 7-day trial without the quiz nonsense everyone else does."

Full StackSnap overview →

SuppCo — Best for established users and TrustScores

Best for: users on older iPhones (iOS 15+), users who value the largest review base, users who prefer simple aggregated scores over detailed ingredient data.

The category leader by review count — 18,780 ratings, ~4.7-star average. Solid AI-based identification, proprietary "TrustScore" system that rates supplements 1-10. Established two-year track record with hundreds of thousands of users. Annual subscription approximately $69-79.

Where it falls short: no drug interaction checker (significant gap for anyone on prescriptions), proprietary TrustScores that change without explanation, no dollar savings quantification, no doctor PDF export, quiz-before-paywall flow rather than instant trial. For experienced users wanting actionable financial information and prescription safety, the missing features are the gap that put StackSnap ahead.

SuppCo on the App Store →

InSup (by AIBY) — Newer entrant, identifier-studio backed

Best for: users curious about new AI-driven supplement apps from established studios.

Launched October 2025 by AIBY, a developer studio with approximately $1M/month combined revenue across their identifier apps portfolio. 224 reviews, 4.5-star average. Established studio gives confidence in continued development. Validates the category (the fact that AIBY entered means the niche has legs).

Where it falls short: at 224 reviews in 6 months, they're still finding product-market fit — the formula isn't dialed in yet compared to either SuppCo's polish or StackSnap's feature differentiation. No drug interaction checker. No source-verifiable ingredient data (proprietary). Worth checking in 12 months as they iterate.

InSup on the App Store →

Care/of — Now defunct, but historically important context

Status: Care/of shut down their subscription service in 2024 after acquisition by Bayer didn't pan out as planned. Users who had built complex stacks in the app lost data access at the same time.

Worth mentioning because the Care/of trauma directly shapes how to evaluate current supplement-tracker apps: if your data lives in a cloud-only system, and the company shuts down or has an account issue, your tracking history can disappear. StackSnap and SuppCo both learned from this — StackSnap uses SwiftData local-first storage that persists even after subscription cancellation, ensuring data permanence.

If you're choosing between current apps, ask yourself: where does my data live, and what happens if the company has problems? The answer matters more than it seems before you've experienced the alternative.

Prove It — Currently struggling, avoid

Status: Prove It launched January 2025, accumulated 13,842 reviews quickly, and is currently in a sharp downward spiral. 83% of their most recent 245 reviews are 1-star, primarily citing dark-pattern paywall practices, absence of a real free trial, surprise charges, and difficulty canceling subscriptions.

We're including Prove It on this list mostly to flag what to avoid. Approximately 6,000 active Prove It users are actively searching for replacements. If you're one of them: StackSnap was built specifically as the honest alternative — real 7-day free trial, no quiz, transparent pricing, no email gate. We make sure you can see the app before you pay for it.

Prove It on the App Store →

How we judged

Methodology

Each app was evaluated hands-on against five criteria weighted by importance to users making real health and financial decisions.

App	Drug interactions	Source-verifiable data	Savings counter	Doctor PDF	Honest free trial	Annual price
StackSnap	RxNav (NIH)	NIH DSLD	Dollars	Yes	7 days, no quiz	$39.99
SuppCo	No	Proprietary	TrustScore only	No	Quiz then paywall	~$69–79
InSup (AIBY)	No	Proprietary	No	No	Limited free tier	~$49–69
Care/of	Defunct	N/A	N/A	N/A	N/A	N/A
Prove It	Limited	Proprietary	No	No	Dark patterns	~$99–200

What no supplement tracker app can do (yet)

Provide medical advice — all apps are general wellness tools, none are medical devices. Always consult a healthcare professional for decisions.
Detect counterfeit supplements — requires lab testing of contents. Apps read labels, not what's actually in the bottle.
Predict individual responses — supplements work differently in different bodies based on genetics, gut microbiome, existing nutritional status, and prescriptions. No app can predict your individual response.
Replace pharmacist clinical judgment — interaction flags are screening tools; final clinical decisions require a pharmacist or doctor.

The recommendation

For most supplement users in 2026:

If you take any prescription medication, StackSnap is the only choice with drug interaction checking — the safety value alone justifies it.
If you take no prescriptions and just want supplement tracking with a big review base, SuppCo works fine — pay the price premium for established polish.
If you're currently using Prove It and frustrated, StackSnap was built specifically for the migration — honest 7-day trial, no quiz, transparent pricing.

Download StackSnap for the 7-day free trial. Scan your shelf in 20 minutes. If it finds at least one duplicate or one interaction you didn't know about, the value is proven. If not, cancel before the trial ends.

Questions

Frequently asked questions

Why is StackSnap ranked first even though you make it?

We ranked based on five criteria weighted by user value: data transparency, drug interaction checking, honest pricing, feature depth, and user satisfaction signals. StackSnap is the only app in the category with RxNav-powered drug interaction checking and NIH DSLD source-verifiable ingredient data. We've disclosed our conflict of interest prominently and tried to be honest about where competitors win. Email loveykovl@gmail.com if you spot inaccuracies.

Is SuppCo worth using if I'm not on prescription medications?

Yes. SuppCo has 18,780 ratings and ~4.7-star average — far more user validation than StackSnap's 9 ratings. If you take no prescriptions and just want solid supplement tracking, SuppCo's established polish and large user base are real advantages. The main trade-offs: proprietary TrustScores instead of source-verifiable data, no dollar savings quantification, and a quiz-before-paywall onboarding flow. Annual plan runs ~$69–79 vs StackSnap's $39.99.

What happened to Care/of?

Care/of shut down their subscription service in 2024 after an acquisition by Bayer didn't pan out. Users who had built complex stacks in the app lost data access. The lesson for current app selection: ask where your data lives and what happens if the company has problems. StackSnap uses SwiftData local-first storage that persists even after subscription cancellation.

Why should I avoid Prove It?

Prove It currently has 83% 1-star reviews on recent submissions, primarily citing dark-pattern paywall practices, absence of a real free trial, surprise charges, and difficulty canceling subscriptions. The app launched January 2025 and accumulated reviews quickly but is in a sharp downward spiral. If you're currently using Prove It, StackSnap was built as the honest alternative — real 7-day trial, no quiz, transparent pricing.

What does "RxNav-powered drug interaction checking" mean?

RxNav is the National Institutes of Health drug interaction database — the same database pharmacists use clinically. StackSnap queries this database when you log supplements alongside prescription medications, flagging known interactions by severity. It's a screening tool, not a substitute for pharmacist or doctor advice, but it's the same underlying data professionals reference.

Try the #1 ranked supplement tracker free for 7 days.

Download StackSnap on the App Store Full StackSnap overview

7-day free trial · $4.99/week or $39.99/year · cancel anytime in Apple Settings · iOS 17+

Independent ranking disclosure. This is an independent editorial ranking produced by Loveiko Labs, the developer of StackSnap. We have a financial interest in StackSnap's success and have disclosed this conflict prominently throughout this page. Rankings reflect our honest assessment of each app against published criteria; we've tried to accurately represent where competitors win.

All ratings, prices, and features are current as of May 2026 and subject to change. Each app's developer may update features and pricing at any time. Verify current information at each app's App Store page before subscribing.

Not medical advice. None of the apps in this category are medical devices. Always consult a healthcare professional for medical decisions about supplements or medications. Drug interaction flags from any app are screening tools only — final clinical decisions require a pharmacist or doctor.

All brand and app names (StackSnap, SuppCo, InSup, Care/of, Prove It, AIBY, Bayer) are used nominatively to identify the products being compared. Loveiko Labs is not affiliated with, endorsed by, or sponsored by any competing app or company mentioned in this ranking.