Renka vs StudyFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Renka
This app uses advanced 3D scanning to analyze facial features, symmetry, and proportions. It offers personalized recommendations for hairstyles, glasses, and makeup, and simulates potential cosmetic changes.
- Precise 3D face measurements
- Face shape analysis
- Plastic surgery simulator
- Golden ratio analysis
- Symmetry score
- Attractiveness score
- Personal color analysis
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Renka - Real 3D Face Scanner Renka goes beyond 2D photo analysis and measures your face in true 3D with the IR depth sensor. ■ Precise 3D Measurement Your iPhone's IR depth sensor captures your face in real 3D — width, height and surface area 2D apps can't provide. ■ Face Shape Analysis Your face shape — oval, round, square, heart, oblong or diamond — with hairstyle, eyewear and makeup recommendations. ■ GlowUp Tips Beauty tips built from your own numbers — hair, brows, makeup, skincare ingredients and de-puffing — with one-tap links to AI try-on and the guides. ■ Your Better Self (BETA) Preview yourself after following your tips — clearer skin, brighter under-eyes, tidied brows, makeup and a face-shape hairstyle — on your photo with a before/after slider. Care effects only. ■ Plastic Surgery Simulator Preview 30+ procedures on your own photo — eyes, nose, midface, lips, jaw, cheeks, wrinkles and fillers — with sliders and before/after. Tap Details for what each involves; some are free. ■ Golden Ratio Analysis Compare your proportions with the golden ratio: eyes, nose, lips, facial thirds and overall harmony. ■ Symmetry Score Measure your facial symmetry and left-right balance. ■ Attractiveness Analysis One score from golden ratio, symmetry, contour and expression. ■ Jawline & Contour Analysis A contour score from your gonial angle, fWHR and chin angle — plus your jawline type: angular, standard, or soft. ■ Volume Balance · Face Sculpting (BETA) Your 3D face mesh measures projection and hollows in millimeters across ten regions, from forehead to jawline, and maps where adding or reducing volume would improve balance — with makeup tips, a simulator preview and a consultation card. ■ Skin Analysis A skin map visualizing blemishes, pigment and redness, with a 5-axis radar and area care guides. ■ Eye Shape, Nasolabial Line & Dark Circles Eye tilt, MRD1, nasolabial depth and a dark-circle index — in numbers. ■ AI Beauty Consultation (Rena) One-on-one consultations with Rena, your AI beauty agent — makeup, hairstyle and skincare advice from your real measurements. ■ AI Hairstyle & Glasses Try-On Try 19 women's and 14 men's hairstyles, 3 colors and 6 glasses on your photo, with picks for your face shape — photorealistic in seconds. ■ Swelling Tracking Track daily swelling — morning puffiness or skincare effects — with per-area indexes and a heatmap vs. your baseline. ■ DietCam — free calorie & sodium tracking Snap a food photo to log calories, sodium and glycemic index to Apple Health — free, unlimited. Compare sodium with your swelling; ask Rena about tricky dishes. ■ Measurement History Save your measurements and track changes over time in easy-to-read charts. ■ 100-Day Challenge Report Every 100 days: your changes vs. the last period, all-time trends and Rena's AI summaries. ■ Personal Color Analysis Discover your personal color, with Personal Color Precision Fitting (digital draping). ■ Live AR Filter Face shape, thirds/fifths ratios and profile angle as live overlays — record and share in one go. ■ Beauty Selfie A real-time beauty studio: soft glow, midface, V-line, eye size and nose sliders — capture instantly. ■ Pro Features: • Your Better Self preview (BETA) • 100-Day Challenge Report • Unlimited AI consultation (beauty & diet) • AI Hairstyle & Glasses Try-On • Volume Balance · Face Sculpting (BETA) • Unlimited DietCam AI food recognition (Rena) • Sodium–Swelling trend chart • All simulator procedures • Unlimited measurements • No ads • Detailed analysis reports • Unlimited history access ■ Disclaimer: Renka is for entertainment and reference only and does not provide medical advice, diagnosis or treatment. Consult a qualified professional for medical or cosmetic decisions. --- Privacy Policy: https://fattaillabs.com/RenkaAI/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
StudyFlow
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StudyFlow is the all-in-one companion built for university students. Whether you're racing to register for classes, reviewing flashcards before an exam, or just trying to remember where you left your budget — StudyFlow keeps your entire student life in one clean, native app. - Schedule & Academic See your weekly timetable at a glance with a live Home Screen widget. Track grades, monitor exam dates, and breeze through course registration — all synced with your university account. - Tasks & Focus Add to-dos with natural language ("tomorrow 3 pm") via Siri Shortcuts. Beat procrastination with a built-in Focus timer and a visual Peak Hours chart that shows when you study best. - Flashcards Built-in spaced-repetition flashcard review so you can study smarter, not harder. Ask Siri how many cards are due without even opening the app. - Notebooks Write rich notes and record audio during lectures — a persistent recording indicator keeps you aware even when you switch tabs. Share notes as .sfnote files via AirDrop or Files. - Finance & Expenses Check your campus card balance, review transactions, and track personal expenses — so you always know where your money went. - Streaks & Motivation Earn XP, build daily streaks, and tend your virtual duck farm, as a reward for consistent study sessions. Celebrate milestones with your friendly mascot. - News Stay informed with a curated news feed from top global sources — all translated on-device so you can read in your preferred language. - Privacy-First Your credentials are stored securely in the iOS Keychain. App Lock with Face ID / Touch ID keeps your data private. Works with iPhone, Apple Watch, and Home Screen Widgets.
Screenshots
Verdict
The clearest difference is in-app purchases: StudyFlow at none against Renka's 5. StudyFlow also leads on ads (none vs shown) and device support (3 vs 1). On price, update cadence 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
Both are free to download. Renka sells 5 in-app purchases, starting at $1.99 per 7 days. StudyFlow asks for nothing beyond the download.
Renka ships an update every 6 days, StudyFlow every 10 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.
| Parameter | Renka | StudyFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (11 ratings) — better | — |
| Positive reviews | 69.2% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 6 days — better | Every 10 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 105 MB | 50 MB |
| Age rating | 12+ | 4+ |
| Developer | FatTail Labs | Nhat Nguyen Ngoc |
In-app purchases
Renka
- Renka PRO Weekly (Special)$1.997 Days
- Weekly Pro7 Days trial$6.997 Days
- Renka PRO Annual (Special)$9.991 Year
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- Yearly Pro1 Year trial$29.991 Year
- Lifetime Pro$79.99
StudyFlow
No in-app purchases








