Soso vs Flow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Soso
This app helps young girls understand puberty and track their menstrual cycles. It provides age-appropriate information, predicts the first period, and logs symptoms and moods without pressure.
- Predicts first period arrival
- Tracks puberty stages
- Logs cycle flow and spotting
- Records moods and symptoms
- Provides age-appropriate explanations
- Offers daily check-ins and prompts
- Visual calendar and history view
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Soso is the first period tracker that starts before the first period. It follows the signs of puberty, estimates when hers is coming, and becomes a full cycle tracker from there. A place to learn and observe, without pressure, noise, or adult-focused content. Safe and clear both for the girls using it and the parents guiding them. We built Soso as parents. When our daughter started asking about her body, every app we found was made for adults, with language and features that were wrong for a first experience. What Soso helps with: - Soso focuses on understanding and learning first, then tracking comes naturally - Learn about cycle changes with clear, age-appropriate explanations - Build the habit of noticing and logging periods - Reduce anxiety by providing information at your pace - Create space for conversations between parents and kids Visual cycle tracking - Log periods with simple taps - Visual cues and colors to reflect flow intensity - Log spotting and discharge too, not only period days - Add a note to any day, in her own words - Clear calendar view to see cycles over time - Easy access to past logs and history Daily guidance, gently - Smart daily check-ins during a period - Helpful prompts that guide without forcing answers - No pressure to log everything perfectly - The period tracker adapts over time as more data is added Mood & symptoms - Log symptoms like cramps, headaches, tiredness, bloating and hay fever - Optional mood logging, with simple icons and language - Encourages self-reflection without judgment - Helps connect how the body feels across the cycle “When is my first period coming?” It is the question girls ask us hundreds of times a week, and the one most period apps cannot answer, because they only start working once periods do. Soso answers it. A few questions at the start, and she gets an estimate of when her first period is likely to arrive, in words written for her age. Then it narrows. Every sign she records pulls the window tighter, which is how predicting a first period is actually done: not one guess, but changes followed over time. The First Period Prediction Pack - Follow her development through the illustrated stages of puberty, for breast development and for pubic hair. She compares the drawings privately and picks the closest, the same stages a doctor would use. - Measure her height once a month. A growth spurt is one of the strongest signs a first period is close, and almost no period tracker follows it. - Check-ins on what is changing through puberty - A Signs tab showing how far along she is toward menarche and what usually comes next - An estimate that narrows with everything she adds A one-time purchase, yours for good. Built for families - No adult content - Private by design How Soso works Always free: logging your mood, a quiz a day, and a first estimate of when your period might arrive if it has not started yet. You also begin with 5 Drops for marking your cycle. Soso Plus adds unlimited marking and quizzes, predictions for your next cycles, notes, and the First Period Prediction Pack. It renews monthly or yearly, and you can cancel any time. Questions? Concerns? Suggestions? Get in touch via the app or our support URL on our app page. -------- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Flow
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FlowSync is your intelligent period and cycle tracking companion. With a beautiful, intuitive calendar interface, FlowSync helps you understand your body's natural rhythms. KEY FEATURES: • Smart Calendar — Visual cycle tracking with color-coded days for period, fertile window, and ovulation • Period Predictions — AI-powered cycle predictions based on your history • Symptom Tracking — Log mood, energy, cramps, and other symptoms daily • Today View — At-a-glance dashboard showing cycle day, phase, and upcoming events • Cycle Insights — Understand your patterns with detailed cycle analysis • Beautiful Design — Clean, modern interface that's a joy to use FlowSync is designed for informational and general wellness purposes only. It is not intended to be used for contraception, medical advice, diagnosis, or treatment. Always consult your healthcare provider for medical concerns.
Screenshots
Verdict
The clearest difference is in-app purchases: Flow at none against Soso's 5. Soso's advantage is device support (4 vs 1) and iOS requirement (15.1 vs 17.0). On price, update cadence and ads 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. Soso sells 5 in-app purchases, starting at $9.99 per month. Flow asks for nothing beyond the download.
Soso ships an update every 9 days, Flow every 3 weeks. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.
| Parameter | Soso | Flow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (854 ratings) — better | — |
| Positive reviews | 92.6% of reviews | — |
| Number of ratings | 854 — better | — |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 77 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Beyond Analytics Ltda | 拥军 刘 |
In-app purchases
Soso
- Soso Plus: Monthly$9.991 Month
- Soso Plus: Monthly7 Days trial$9.991 Month
- Soso Plus: Yearly$49.991 Year
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- Soso Plus: Yearly7 Days trial$49.991 Year
- First Period Prediction$9.99
Flow
No in-app purchases









