Comparison

Protolinq vs Kvit

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

Head to head
About

Protolinq

Features
Read full description

ProtoLinq helps you discover clinical studies you may qualify for and stay organized as you explore research opportunities. Browse active studies, review key eligibility details, and find trials near you in a clear, mobile-friendly experience. ProtoLinq makes it easier to understand study options, follow referral progress, and keep important research conversations in one place. Features: - Discover clinical studies near your location - Review study details and eligibility information - Track referrals and follow-up activity - Stay organized with in-app messaging and updates - Manage your profile and research interests in one app

About

Kvit

Features
Read full description

Kvit is a private menstrual period and pregnancy tracker where your intimate health records stay solely yours. No ads. Zero data selling. Cycle tracking, period forecasts, and pregnancy calendar are forever free. In pregnancy, your current week and all past history are free too. Most menstrual cycle apps collect and monetize your sensitive health records. Kvit is built with a different philosophy: encrypted on-device storage, zero data brokers, and a warm, supportive space without preachiness, shame, or pushy marketing. YOUR CYCLE & PERIOD CALENDAR - Interactive cycle circle visualizing all 4 phases: menstrual, follicular, ovulation, luteal. - Honest period prediction: real confidence score instead of artificial certainty. - Ovulation and fertile window guidance for pregnancy planning or natural awareness. - Gentle late period tracking with care and without panic. - Full support for irregular cycles: Kvit adapts gently to your unique body rhythm. - Soft, respectful reminders for upcoming periods, PMS, and fertile days. PREGNANCY WEEK BY WEEK (CURRENT WEEK FREE) - Comprehensive pregnancy companion from week 1 to week 40. - Baby growth compared to lovely fruits and seeds (mango, avocado, peach). - Typical size and weight for each week, in cm and grams. - Body changes, nutrition, and evidence-based self-care guidance. - Trimester health checklists and hospital bag essentials. - Baby kick counter (count to 10) and a contraction timer. - Pregnancy memories and bump photo diary. - Future weeks preview available in Kvit+. HEALTH JOURNAL & SYMPTOMS - Five symptoms in two taps: headache, cramps, bloating, fatigue, backache. - Your own symptoms, no limit, in Kvit+. - Daily mood and an intimacy log. - Weight dynamics with Apple Health and Health Connect sync. - Quick symptom notes for doctor appointments. POSTPARTUM RECOVERY - Support for mother's physical and emotional recovery after childbirth. - Daily feeding and sleep counters plus self-care guidance. - Compassionate guidance for all life situations. FULL PRIVACY: YOUR DATA BELONGS ONLY TO YOU - Your intimate entries are securely protected on your device (AES-256 standard) away from prying eyes. - The database key is stored in your device's own secure system storage (Keychain / Keystore). - Free encrypted cloud backup: switch phones, sign in, and your records are back. No recovery code to remember or lose. - Biometric lock (Face ID / Touch ID / PIN). - Complete data wipe anytime — with confirmation so you never lose your history by accident. DOCTOR PDF REPORT (KVIT+) - Export structured cycle and symptom summaries for your gynecologist visit. KNOWLEDGE LIBRARY - Evidence-based articles citing WHO and NHS guidelines. We explain, we do not frighten. FREE FOR EVERYONE Cycle calendar, period predictions, pregnancy (current & past weeks), kick counter, contraction timer, checklists, diary, weight, reminders, cloud backup. KVIT+ (PREMIUM SUBSCRIPTION) Deep cycle trends, doctor PDF report, custom symptoms, future pregnancy weeks. There are no ads in Kvit. Your entries are not sold and never shared with advertisers. IMPORTANT Kvit is for personal cycle tracking and wellness guidance. It is not a medical device, does not diagnose, and is not a contraceptive. Always consult your healthcare provider for medical decisions. Terms of Use (EULA): https://kvitcare.com/terms Privacy Policy: https://kvitcare.com/privacy

Screenshots

Protolinq4 screens
Kvit4 screens

Verdict

The call

The clearest difference is in-app purchases: Protolinq at none against Kvit's 3. 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. Kvit sells 3 in-app purchases, starting at $2.99 per month. Protolinq asks for nothing beyond the download.

Scorecard1 real difference · 5 level
Protolinq versus Kvit: the parameters behind the verdict, then further details
ParameterProtolinqKvit
PriceFreeFree
Update frequencyEvery 6 days—
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size35 MB55 MB
Age rating17+4+
DeveloperDigital AuxiliusDriveCode LLC

In-app purchases

None

Protolinq

No in-app purchases

3 purchases

Kvit

Subscriptions2
  • Kvit Premium Monthly$2.991 Month
  • Kvit Premium Yearly7 Days trial$19.991 Year
One-time1
  • Kvit Premium Lifetime$39.99

Questions

Is Protolinq free?
Protolinq is free to download, with no in-app purchases.
Is Kvit free?
Kvit is free to download, with in-app purchases available.
Do Protolinq or Kvit have ads?
Neither Protolinq nor Kvit shows ads.

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