Tiny Milestones vs Twin & Preemie
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tiny Milestones
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Centiles helps you monitor your baby's growth using official WHO Child Growth Standards — the same data your pediatrician uses. GROWTH CHARTS Plot weight, length, and head circumference against WHO percentile curves (3rd, 10th, 25th, 50th, 75th, 90th, 97th). Instantly see where your child stands and how they're progressing over time. SIMPLE TO USE Add a measurement in seconds. The chart updates instantly. Switch between weight, length, and head circumference with a tap. View 3, 6, or 12 months — or your child's full history at once. YOUR UNITS, YOUR LANGUAGE Automatic unit detection: metric (kg, cm) or imperial (lbs, in). Change anytime in Settings. Available in 20 languages. SHARE WITH YOUR DOCTOR Export a chart image showing all three measurements and your full measurement history. Perfect for pediatric appointments. HOME SCREEN WIDGET See your child's latest measurements at a glance — right on your home screen. DATA SOURCE WHO Child Growth Standards for boys and girls, ages 0–36 months.
Twin & Preemie
This app helps parents of twins, multiples, or premature babies track feeding, sleep, and growth. It offers adjusted age tracking, visit preparation tools, and a resource hub for specialized guidance. Safely share data with co-parents and caregivers.
- Independent tracking for each baby
- Adjusted age growth charts
- Visit Prep for appointments
- Specialist Navigator
- Resource Hub for guidance
- Secure co-parent sharing
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TinyMiles: The baby tracker built for twins, multiples, and premature babies. If you're navigating twin parenting, triplets, or a NICU journey—you're not following the standard baby book. Neither are we. THE TRACKING THAT MAKES SENSE FOR YOUR BABIES Log feeds, sleep, diapers, and milestones for each baby independently. Stop guessing who ate when. Stop mixing up records. Each baby gets their own timeline, so you always know exactly what you're looking at without the chaos of juggling multiples in your head. ADJUSTED AGE: YOUR SECRET WEAPON Premature babies shouldn't be compared to the standard growth charts—and TinyMiles knows it. We make adjusted age (not just birth age) the centerpiece of tracking. See exactly how your babies are trending against pediatric growth curves that actually apply to them. Walk into every checkup already informed, and finally have a clear answer to "Is my baby on track?"—because *your* timeline is the right one. VISIT PREP: NEVER FORGET A QUESTION AGAIN Pediatrician appointments are chaos with multiples. Visit Prep pulls together each baby's recent logs—feeds, sleep, growth, milestones—and gives you space to write down questions *before* you're sitting in the exam room overwhelmed. Nothing gets forgotten. FIND THE RIGHT SPECIALISTS Twin and preemie parents often need specialists—physical therapy, early intervention, feeding support, developmental pediatrics. The Specialist Navigator helps you identify which specialists matter for your babies' needs, saving you the research rabbit hole. RESOURCE HUB: GUIDANCE BUILT FOR YOUR REALITY Browse vetted guidance on topics that matter to multiples and preemies: adjusted age explained, NICU follow-up care, feeding challenges, milestone timelines. Built for quick reference during exhausting nights—not long medical papers. All written for parents like you. SHARE SAFELY WITH CO-PARENTS AND CAREGIVERS Invite a co-parent, grandparent, or other caregiver to view and log data. Set their relationship so the app feels personal to them. Revoke access anytime from your side. Your data stays yours. WHAT'S INCLUDED BASIC (FREE) — Track feeds, sleep, and diapers for multiple babies. Food allergy profile, food logging, and adding solids included. View milestone and growth charts (read-only). Share access with 1 caregiver. Perfect for tracking and coordination. PREMIUM — Unlock Adjusted Age expertise (our growth charts with adjusted/birth age comparison), full milestone and growth logging, Solid History (track exposed/monitoring/removed status over time), the full Resource Hub directory and Visit Prep. Share with up to 2 caregivers. Premium is available as monthly or annual auto-renewing subscription, with a 14-day free trial. TinyMiles is a tracking and organization tool. It does not provide medical advice, diagnosis, or treatment, and is not a substitute for guidance from your child's pediatrician. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Questions or feedback? We're at support@tinymilesapp.com.
Screenshots
Verdict
The clearest difference is in-app purchases: Tiny Milestones at none against Twin & Preemie's 2. On price, update cadence, ads and device support 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
Both are free to download. Twin & Preemie sells 2 in-app purchases, starting at $9.99 per month. Tiny Milestones asks for nothing beyond the download.
Tiny Milestones ships an update every 2 weeks, Twin & Preemie every 3 weeks. Both last shipped on October 24, 2026.
| Parameter | Tiny Milestones | Twin & Preemie |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (5 ratings) — better |
| Number of ratings | — | 5 — better |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 3 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | KAMIL CZOPEK | Robert Mitchell |
In-app purchases
Tiny Milestones
No in-app purchases
Twin & Preemie
- Premium Monthly14 Days trial$9.991 Month
- Premium Annual14 Days trial$79.991 Year
Questions
Is Tiny Milestones free?
Is Twin & Preemie free?
Do Tiny Milestones or Twin & Preemie have ads?
Which is updated more often, Tiny Milestones or Twin & Preemie?
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