Medisafe vs CanIStackThis
Short version: they solve different problems, and plenty of people could sensibly use both. Medisafe is an adherence app — reminders, refill tracking, and caregiver alerts that help you actually take what you're prescribed. CanIStackThis is a safety tool — it checks whether the supplements and medications you take are safe together. Since January 2026 Medisafe's free plan is capped at 2 medications; our interaction checker stays free no matter how long your list is.
| Medisafe | CanIStackThis | |
|---|---|---|
| Core question answered | "Did I take my meds on time?" — adherence | "Is this combination safe to take together?" |
| Free medication/supplement limit | Free plan capped at 2 medications (since the January 2026 pricing change) | None — check a list of any size, free |
| Interaction checking | Yes — a drug-to-drug interaction checker | Yes — supplement-focused: supplement ↔ supplement and supplement ↔ medication, free regardless of list size |
| Supplement-specific depth (label totals, upper limits) | Limited — built around prescriptions | Our specialty — NIH label-database milligram tally, doubling-up warnings |
| Stack builder & timing/spacing guidance | No | Yes — free builder with spacing suggestions |
| Condition-aware warnings (blood thinners, pregnancy…) | No | Yes (Premium) |
| Dose reminders | Excellent — their specialty (customizable alarms, refill reminders; free plan covers 2 meds) | Yes — free push reminders for your whole stack (simpler than Medisafe’s) |
| Caregiver/family support | Yes — Medfriend alerts a chosen person about missed doses | No |
| DNA-based personalization (MTHFR, COMT…) | No | Yes ($29 one-time report or annual plan) |
| Price | Free for 2 medications; Premium about $4.99/mo for more | Interaction checker free; Premium $9.99/mo |
| Platform | Mobile app | Web + installable app |
When Medisafe is the better tool: you mainly need dose reminders and refill tracking for prescriptions — especially if a family member keeps an eye on you through Medfriend. Adherence is genuinely their specialty: the alarms, tracking, and caregiver features are more polished than anything we offer, and if that's your main need, Medisafe is excellent.
When CanIStackThis is the better tool: your question is about the combination — whether your supplements are safe with each other and with your medications, what to space apart, and where you're doubling up past upper limits. Interaction checking here is free with no cap on list size, our safety scoring is deterministic and publicly documented, and we never sell products, run ads, or take affiliate commissions. Both apps include reminders for free — theirs are more customizable, ours cover your whole stack.
Factual comparison based on both products' public materials and third-party reporting as of August 2026; Medisafe is a trademark of its owner, which is not affiliated with CanIStackThis. Spot an inaccuracy? Tell us and we'll fix it. Educational information only — not medical advice.