KnowSelf vs OgdenSpine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KnowSelf
Discover your unique strengths and enhance self-awareness with a professional psychological assessment tool. This app utilizes a refined question bank based on established psychological theories to help you understand your personality type.
- Professional psychological assessment
- Refined 6-option question bank
- Enhance self-awareness
- Discover unique strengths
- Based on MBTI theory
- Career and love match insights
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Get to know your personality and make sense of your everyday moods. KnowSelf brings together personality and well-being assessments, a sticker mood journal, and simple ways to unwind. Discover different sides of yourself and take time to notice how you feel. Discover more about yourself Explore MBTI, the Big Five, career interests, relationships, and more. Learn about your preferences, how you think, and how you relate to others, with clear reports that help you understand your results. Use emotional well-being assessments to check in with how you've been feeling lately. Your self-portrait, ready to share Bring your personality, interests, and thinking styles together in a personal profile card. Save it, share it with friends, and discover what you have in common and what makes you different. Capture your mood with stickers Choose a sticker that fits how you feel, add a few words, or keep a photo of the moment. From joy and calm to feeling hurt or worn out, make room for the subtler shades of your emotions. Revisit moments on your calendar and explore weekly, monthly, and yearly mood patterns. Find the words and take a breather Not sure how you feel? Use the Emotion finder to discover words that feel right. Slow down with a one-minute breathing exercise, or settle into white noise and scenic soundscapes when you want to focus, rest, or unwind. A little inspiration, every day Discover thoughtful quotes paired with beautiful works of art. Save or share a card that speaks to you, keep your favorites, and revisit past cards. Choose whether to show daily inspiration on your home screen. Assessments are for self-reflection and information. They do not replace a professional medical diagnosis. KnowSelf Pro Choose an annual auto-renewable subscription or a one-time lifetime purchase to unlock Pro features and remove ads. Payment is charged to your Apple Account at confirmation. Annual subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage or cancel your subscription in your App Store account settings. Eligible purchases from earlier versions can be restored in the app. Privacy Policy: https://psychang.com/knowself/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
OgdenSpine
Master English with a core vocabulary of 850 essential words. This app offers multilingual support, daily word reviews, sentence practice, and writing tools to build clear communication skills.
- 850 core English words
- Multilingual support
- Daily word review
- Sentence practice
- Writing analysis
- Progress tracking
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Ogden's Spine helps you build English from the 850 core words of Ogden Basic English. Instead of chasing endless vocabulary lists, the app focuses on a compact set of high-value words that support clear reading, writing, and sentence building. Version 2.0 adds full multilingual support for English, Simplified Chinese, Traditional Chinese, Japanese, Korean, French, and Spanish learners. You can study word meanings in your preferred language, review daily words, explore the Word Atlas, practice sentence lessons, and write with a built-in 850-word ratio checker. Key features: - Daily word sets for steady review - Word Atlas for the full 850-word system - Sentence Club with structured practice scenes - Play modes for opposite words and sentence sense - Writing Sandbox with core-word analysis - Progress tracking and language preferences Build a stronger English spine with simple words, clear practice, and multilingual support. Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: OgdenSpine at none against KnowSelf's shown. KnowSelf's advantage is ratings volume (37 vs 1) and device support (3 vs 1). On price, rating, review sentiment and update cadence 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. KnowSelf sells 1 one-off in-app purchase and OgdenSpine sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for KnowSelf against 5.0 for OgdenSpine. That said, the two scores are not equally well evidenced: KnowSelf has 37 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 58% of KnowSelf's written reviews are positive against 63% of OgdenSpine's.
KnowSelf ships an update monthly, OgdenSpine fortnightly. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.
| Parameter | KnowSelf | OgdenSpine |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (37 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 57.9% of reviews | 62.5% of reviews — better |
| Number of ratings | 37 — better | 1 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 87 MB | 12 MB |
| Age rating | 12+ | 4+ |
| Developer | Baofeng County Jixu Education Information Consulting Co., Ltd. | Naihe Hu |
Customer experience
KnowSelf
OgdenSpine
In-app purchases
KnowSelf
- MBTI Report Pro Version$1.99
OgdenSpine
- MonthlyPro$1.991 Month
- YearlyPro$19.991 Year
- Life Time ProFree
- Capture Unlock$5.99








