Comparison

Undiet vs SimpleRX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Undiet

Features
Read full description

Undiet is a private tracker for your weight journey and a community of people walking the same road. Log how your day went, keep progress photos in a vault that never leaves your phone, mark which diet or treatment you are on, and see what actually works for you. NEW IN UNDIET 2.0 Undiet has been rebuilt from the ground up. If you used the original Undiet with an email account, sign in with the same email and your history comes along. The photo tracker is back, now with a locked vault and side by side compare, joined by a diet catalog, a community and a calmer way to log your day. YOUR PHOTOS STAY ON YOUR PHONE Progress photos are stored only on this device, behind Face ID or your passcode. They are never uploaded, never shared and never used to train anything. Not even we can see them. Line up front and side photos from any two dates and watch the change. EFFORT, NOT CALORIES No food database, no barcode scanning, no counting. Each day you log your weight and how much effort the day took, in a couple of taps. Over weeks the graph shows the trend, and the streak rewards showing up, never the number on the scale. ONE TIMELINE, ANY DIET Pick what you are on from a catalog of eating patterns and treatments: Mediterranean, keto, low carb, intermittent fasting, calorie counting, vegetarian, high protein, GLP-1 therapy (semaglutide, tirzepatide, liraglutide) and dozens more, or simply no diet, just tracking. Switch any time. Your journey becomes a timeline of periods with the weight curve over all of them, so you can see what worked for you and what happened after you stopped. GLP-1 DIARY On medication? Record doses, appetite and how you feel through titration, therapy and the maintenance phase afterwards. It is a diary, not a dosing guide: always follow your doctor. PEOPLE ON THE SAME ROAD Your journey is private. The Community is a separate space under a nickname: share a check in, ask a question anonymously, send a word of support. Supportive reactions only, no downvotes, and photos can never be posted. Report and block are one tap away and every post is moderated. YOUR DATA IS YOURS • Progress photos never leave the device • Nickname only in the community, no real names • No ads, no data selling, no tracking across apps • Export everything or delete your account in two taps, from inside the app UNDIET PLUS Tracking, the catalog and the community are free. Undiet Plus unlocks unlimited photo history, your full weight trend over all time and the stats for every diet period. Auto renewing subscription: EUR 6.99 per month or EUR 39.99 per year with a 7 day free trial on the yearly plan (prices may vary by country). Payment is charged to your Apple ID at confirmation of purchase or when the trial ends. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel it in your App Store account settings. Undiet does not give medical or dietary advice and is not a substitute for your doctor. The catalog describes diets and treatments neutrally so you can record what you are on. Undiet is for people aged 16 and over. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: https://undiet.krnic.be/terms Privacy Policy: https://undiet.krnic.be/privacy

About

SimpleRX

This app helps users manage their medications with automatic reminders and refill alerts. It also offers features for caregivers to monitor adherence and provides crucial medical information for emergencies.

Highlights
  • Medication tracking and reminders
  • Barcode scanning for prescriptions
  • Refill alerts
  • Caregiver monitoring
  • Drug interaction checker
  • Medical ID card
  • Printable EMS Quick Reference Card
Features
Read full description

SimpleRX is a medication tracker built by a paramedic who saw firsthand what happens when patients can't remember their medications. It's designed to be simple enough for anyone to use, and detailed enough to matter when it counts. For patients: Add your prescriptions in seconds by typing the name or scanning the barcode on your pill bottle. SimpleRX looks up what the medication is for and sets your daily reminders automatically. When you're running low, it reminds you to refill before you run out. For caregivers: Stay connected to the people you care for. Get notified when they take a dose, miss one, or need a refill. View their medications, adherence history, and emergency information — all from your own phone. Safety features built in: SimpleRX checks for drug interactions every time you add a new medication and explains them in plain English. It tells you what side effects to expect when starting something new, and alerts opioid patients about Narcan and where to get it free. Emergency ready: Build a complete Medical ID card with your conditions, allergies, blood type, DNR status, and emergency contacts. Generate a printable EMS Quick Reference Card that first responders can read at a glance, designed by a paramedic for patients. What makes SimpleRX different: Large buttons and clear text designed for elderly users Speaks your medication name out loud when it's time to take it No complicated setup, works in minutes Available in English and Spanish Caregiver access is always free One simple price, no subscription ever

Screenshots

Undiet4 screens
SimpleRX4 screens

Verdict

The call

The clearest difference is iOS requirement: Undiet at 15.1 against SimpleRX's 26.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Undiet sells 2 in-app purchases, starting at $5.99 per month and SimpleRX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Undiet ships an update weekly, SimpleRX every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 8 level
Undiet versus SimpleRX: the parameters behind the verdict, then further details
ParameterUndietSimpleRX
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.1 — better26.5
Further details — not scored
Size43 MB13 MB
Age rating17+4+
DeveloperKrnicLuke Heyne

In-app purchases

2 purchases

Undiet

Subscriptions2
  • Undiet Plus Monthly$5.991 Month
  • Undiet Plus Yearly7 Days trial$34.991 Year
1 purchases

SimpleRX

One-time1
  • Unlock SimpleRX$2.99

Questions

Is Undiet free?
Undiet is free to download, with in-app purchases available.
Is SimpleRX free?
SimpleRX is free to download, with in-app purchases available.
Do Undiet or SimpleRX have ads?
Neither Undiet nor SimpleRX shows ads.
Which is updated more often, Undiet or SimpleRX?
Undiet ships an update weekly, and SimpleRX every 5 days. Most recently, Undiet was updated on November 3, 2026 and SimpleRX on October 31, 2026.

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