Comparison

byOne vs T1DAL

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

Head to head
About

byOne

Features
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byOne is the ultimate workout tracker designed to keep your training focused and organized. Whether you're lifting heavy or just trying to stay consistent, byOne adapts to your schedule. Features: • Smart Scheduling: Easily plan your week, swap workout days, and manage rest days. • Clean Tracking: Log your sets, reps, and weights without distractions. • Live Activities: Keep an eye on your rest timers right from your lock screen. • Your Routine: Use built-in templates or create your own custom workouts. Love byOne? A quick App Store review helps us out massively! Have a feature request or need help? Reach out directly at byone.support@gmail.com so we can actually reply to you!

About

T1DAL

This app helps manage type 1 diabetes by providing pre-meal insulin reminders and logging food intake. It offers offline access to carb data, glucose history from Apple Health, and a resource library for support.

Highlights
  • Pre-meal insulin reminders
  • One-tap food logging
  • Barcode scanning for carbs
  • Offline menu data
  • Glucose history from Apple Health
  • Offline resource library
  • Private journal and check-ins
Read full description

I have type 1, and I built T1DAL because the apps I could find either wanted to work out my insulin or wanted to grade me. This one does neither. It never suggests a dose, and nothing in it scores your diabetes. THE PREBOLUS NUDGE Taking insulin before a meal instead of during it is the habit that helps most and slips most. T1DAL learns when you actually eat and asks, a little before: "Lunch soon. Insulin first?" A question about sequence, with no number in it. You pick which meals get one, you can add your own, and a meal logged ahead puts a count to it on your lock screen. LOGGING IN ONE TAP From the app, the lock screen, the widget, or the notification itself. What you ate and when. Never how much you took. CARBS OFF THE LABEL Scan the barcode on a pack and the carbs come from the label. Eating at a chain? About 25,000 menu items from 91 chains, public health department data kept on the phone so it works with no signal, with the year it comes from stated at the top of the screen. Correct a number once and the app remembers that food. YOUR GLUCOSE HISTORY If your CGM app shares to Apple Health, T1DAL can read it with your permission and show the last fourteen days: time in range, overnight average, night lows, and how long your sensor has left. It is a picture of what happened, not a live number and not an alarm. It stays on the phone and is never written back. THE REFERENCE SHELF Seventy-five terms in plain words. Pieces about the parts nobody briefs you on: broken sleep, rationing supplies, burnout, the mental load, the first months. Device and insulin-cost helplines, crisis lines, and a search of the public provider registry for an endocrinologist. All of it works offline. SOMEWHERE TO PUT THE HARD DAYS A four-question check-in with no score, and a journal nobody reads but you. On iPhones with the model built into iOS, T1DAL can reflect an entry back to you, written on the phone, with nothing sent anywhere. NO ACCOUNT, NO ADS, NO SERVER Nothing to sign up for. Everything lives on your phone. Export all of it to a file, or delete all of it, from inside the app. T1DAL is a wellness app, not a medical device, and not medical care. It does not diagnose or treat anything, and it never suggests insulin doses. Decisions about your diabetes belong with you and your care team.

Screenshots

byOne4 screens
T1DAL4 screens

Verdict

The call

The clearest difference is in-app purchases: T1DAL at none against byOne's 3. byOne's advantage is update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement 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. byOne sells 3 one-off in-app purchases. T1DAL asks for nothing beyond the download.

UpkeepUpdate frequency

byOne ships an update every 2 days, T1DAL fortnightly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
byOne versus T1DAL: the parameters behind the verdict, then further details
ParameterbyOneT1DAL
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 2 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone
Requires iOS17.016.4 — better
Further details — not scored
Size20 MB60 MB
Age rating4+17+
DeveloperKhalifa SeckJakob Werner

In-app purchases

3 purchases

byOne

One-time3
  • Small tip$1.99
  • Coffee$4.99
  • Big tip$9.99
None

T1DAL

No in-app purchases

Questions

Is byOne free?
byOne is free to download, with in-app purchases available.
Is T1DAL free?
T1DAL is free to download, with no in-app purchases.
Do byOne or T1DAL have ads?
Neither byOne nor T1DAL shows ads.
Which is updated more often, byOne or T1DAL?
byOne ships an update every 2 days, and T1DAL fortnightly. Most recently, byOne was updated on November 6, 2026 and T1DAL on October 31, 2026.

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