Comparison

Iris GLP vs Lighter

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

Head to head
About

Iris GLP

This app helps adults manage their GLP-1 medication routines, track symptoms, weight, and nutrition. It provides dose history, reminders, and summaries for doctor's visits. Advanced features are available with a subscription.

Highlights
  • Medication logging and reminders
  • Symptom and side-effect tracking
  • Weight and nutrition monitoring
  • Appointment preparation summaries
  • Apple Health integration
  • Home screen widgets
Features
Read full description

Iris is a private GLP-1 logging and organization app for adults who want to keep medication routines, symptoms, weight, reminders, and appointment notes in one place. Record the medication and dose amount you already take, log shot or pill routines, track side effects, weight, hydration, protein, fiber, and calories, and save questions for your next visit. Features: • Dose history and reminders • Symptom and side-effect logging • Weight and nutrition trends • Calendar-based history • Visit prep summaries • Apple Health import • Home Screen widgets • Export and local data controls Some advanced features require an Iris+ subscription. Iris is for personal logging and organization only. It does not diagnose, prescribe, calculate, recommend, or adjust medication dosages. Medication decisions should be made with a licensed healthcare professional. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://iristracker.app/legal/privacy/

About

Lighter

Effortlessly track your GLP-1 medication doses, injection sites, and side effects. Monitor your medication levels and weight trends with a simple, intuitive interface designed for consistency.

Highlights
  • Log injections or pills in seconds
  • Rotate injection sites on a body map
  • Set shot-day reminders
  • View estimated medication level
  • Track side effects and patterns
  • Monitor weight trends
  • No account required
Features
Read full description

Lighter is the dead-simple GLP-1 tracker. Log every shot in two taps, see your estimated medication level, and make every dose count — without the overwhelm. You're spending a fortune on the most important thing you've done for your body. Lighter makes sure none of it slips through the cracks. Log your dose, your injection site, and how you felt in seconds — and finally see the rhythm of your GLP-1 journey on one calm timeline. Works with every major GLP-1 and peptide — semaglutide, tirzepatide, retatrutide, dulaglutide, liraglutide, orforglipron, compounded, weekly or daily. TRACK EVERY SHOT IN TWO TAPS • Log injections or pills in seconds — dose, injection site, and how you felt • Rotate injection sites on a simple body map • Set shot-day reminders and a next-dose countdown, so you never wonder "did I take it?" SEE YOUR MEDICATION LEVEL • Watch your estimated medication level rise and fall between doses • Modeled per medication, so you can see where you are in your dosing window • An informational estimate — not medical advice KNOW YOUR SIDE EFFECTS • Log nausea, fatigue, food noise, and more — on a panel you customize • Track severity and spot your own patterns by dose and site • Keep clear notes to talk through with your healthcare provider SEE YOUR PROGRESS • Simple weight tracking and trends • A clean daily view of your doses, weight, and side effects — all in one place BUILT TO STAY LIGHT • Start instantly — no account required • Private by default. We never sell your data. • Fast, calm, and clear — the essentials done well, not twenty features you'll never open WHY LIGHTER Most GLP-1 apps bury you in food scanners, macros, and dashboards until tracking feels like another job. Lighter does the opposite. It keeps you to what actually matters — your dose, your patterns, and your progress — so staying consistent feels effortless. SUBSCRIPTION Lighter is a subscription app. A subscription unlocks full access; you can start with a free trial where offered. Payment is charged to your Apple ID, renews automatically unless canceled at least 24 hours before the period ends, and can be managed or canceled anytime in your App Store account settings. HEALTH DISCLAIMER Lighter is for tracking and educational purposes only. It does not provide medical advice, diagnose conditions, treat side effects, or recommend dose changes. The estimated medication level is an informational estimate, not medical guidance. Always talk with your healthcare provider about medication decisions, side effects, or health concerns. Privacy Policy: https://uselighter.com/privacy/ Terms of Use: https://uselighter.com/terms/ Consumer Health Data Privacy: https://uselighter.com/consumer-health-privacy/ Support: support@uselighter.com

Screenshots

Iris GLP4 screens
Lighter4 screens

Verdict

The call

The clearest difference is monetization model: Iris GLP at freemium against Lighter's subscription. Lighter's advantage is ratings volume (24 vs 5). On price, rating, review sentiment and update cadence 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. Iris GLP sells 2 in-app purchases, starting at $7.99 per month and Lighter sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Iris GLP against 5.0 for Lighter. Both are backed by a comparable volume of ratings — 5 and 24 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

Scorecard2 real differences · 8 level
Iris GLP versus Lighter: the parameters behind the verdict, then further details
ParameterIris GLPLighter
PriceFreeFree
Rating5.0 (5 ratings)5.0 (24 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings524 — better
Update frequencyEvery 4 daysEvery 4 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhoneiPhone
Requires iOS18.617.0 — better
Further details — not scored
Size31 MB82 MB
Age rating12+12+
DeveloperIris Tracker LLCFlame Industries

Customer experience

Iris GLP

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Lighter

All ratings24 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews20 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Iris GLP

Subscriptions2
  • Iris+ Monthly$7.991 Month
  • Iris+ Annual$39.991 Year
2 purchases

Lighter

Subscriptions2
  • Lighter Premium (Monthly)$9.991 Month
  • Lighter Premium (Annual)3 Days trial$39.991 Year

Questions

Is Iris GLP free?
Iris GLP is free to download, with in-app purchases available.
Is Lighter free?
Lighter is free to download, with in-app purchases available.
Which has better reviews, Iris GLP or Lighter?
Iris GLP and Lighter are both rated 5.0 out of 5 on the App Store, from 5 and 24 ratings respectively.
Do Iris GLP or Lighter have ads?
Neither Iris GLP nor Lighter shows ads.
Which is updated more often, Iris GLP or Lighter?
Iris GLP ships an update every 4 days, and Lighter every 4 days. Most recently, Iris GLP was updated on October 23, 2026 and Lighter on October 21, 2026.

Other comparisons