SkillCert vs Today's Letter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SkillCert
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【About This App】 Supports over 200 certifications and qualifications! Compete in real-time battles and weekly ranked matches using AI-generated exam questions based on official certification names and syllabi. Connect with fellow learners through SNS-style features and chat to expand your learning community. 【Features】 • Real-Time Battles: Compete online against other users using certification knowledge. Winners are determined by both accuracy and response speed. • Ranked Matches: Weekly seasonal rankings! Visualize your ranking and deviation score through competitive matches. • Practice Mode: Randomly selects 10 questions from the exam database. Ask AI about topics you do not understand. Users can vote questions as Good/Bad, and questions receiving many Bad votes are automatically removed every week. • Flashcards / Glossary • Community Features: Stay motivated and connect with like-minded learners through timelines (SNS), direct messaging, and chat features. • AI Diagnostic System: Automatically identifies weak areas and suggests the next best study actions to minimize learning time. 【Terms of Service / Privacy Policy】 Terms of Service: https://scba-ai.com/en/terms Privacy Policy: https://scba-ai.com/en/privacy
Today's Letter
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Enjoy writing and exchanging letters together with your child. Choose cute stationery and stamps, and share your feelings in your own words. 【What you can do】 ・Choose who to write to ・Pick your favorite stationery and write a letter ・Decorate your letter with cute stamps ・Put your finished letter in the mailbox ・Read the letters you receive “Thank you,” “I love you,” or something that happened today. Thinking about what to write together can spark conversations with your child. Simple controls make it easy to get started, even with a first letter. Enjoy the fun of writing and the joy of receiving letters together in a gentle, welcoming setting.
Screenshots
Verdict
The clearest difference is in-app purchases: Today's Letter at none against SkillCert's 3. Today's Letter also leads on ads (none vs shown). SkillCert's advantage is update cadence (every 4 days vs every 3 months) and device support (3 vs 1). On price 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. SkillCert sells 3 in-app purchases, starting at $2.99 per month. Today's Letter asks for nothing beyond the download.
SkillCert ships an update every 4 days, Today's Letter every 3 months. Both last shipped on November 5, 2026.
| Parameter | SkillCert | Today's Letter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 155 MB | 82 MB |
| Age rating | 12+ | 4+ |
| Developer | Yotaro SATO | Mami Kawai |
In-app purchases
SkillCert
- SKILL Cert by AI ライトプラン$2.991 Month
- SKILL Cert by AI スタンダードプラン$9.991 Month
- SKILL Cert by AI プレミアムプラン$29.991 Month
Today's Letter
No in-app purchases









