Cardify vs Silent Proof
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cardify
Photograph homework questions to receive step-by-step explanations and mistake analysis. Organize and review saved questions by subject, then print practice worksheets with or without solutions. This tool aids understanding and revisits errors, but is not a teacher replacement.
- Photograph homework questions
- Step-by-step explanations
- Mistake analysis
- Organize by subject and topic
- Printable practice worksheets
- AI recognition and correction requests
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Turn a difficult homework question into a clearer next step. Photograph a question from homework, a worksheet or a practice test. Select the complete problem, compare your work with a step-by-step explanation, and keep the result for later review. SCAN AND UNDERSTAND - Capture a question with the camera or import an image from Photos. - Select the question area before recognition. - Review the question, your original work, the solution steps and mistake analysis together. - Keep the original image to check details. If recognition or an explanation is incorrect, submit a correction request. ORGANIZE AND REVIEW - Find saved questions by subject, topic and date. - See which subjects and topics appear most often in your mistakes. - Open selected topic review questions where available. Try solving first, reveal the explanation, then mark your understanding. RETURN TO PAPER PRACTICE - Select saved mistakes or available review questions for printing. - Preview the worksheet and export it as a PDF or print through the system sharing options. - Choose whether to include solution steps and mistake analysis when printing saved mistakes. Made for students and families using iPhone and iPad. Cardify helps you understand and revisit mistakes; it is not a replacement for a teacher. AI recognition and explanations can be incorrect, so check important details. SUBSCRIPTIONS AND IN-APP PURCHASES - Cardify offers weekly (1 week), monthly (1 month) and yearly (1 year) auto-renewable membership plans. - Some features, including topic flashcard review, require an active membership. Benefits, AI usage allowances or credits, subscription duration and the local price are shown on the purchase screen before confirmation. - Payment is charged to your Apple Account when the purchase is confirmed. If a trial or introductory offer is displayed, its purchase-screen terms apply. - Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Your account may be charged for renewal within the 24 hours before the current period ends. - Manage or cancel your subscription in Settings > your name > Subscriptions, or in your App Store account settings. - One-time purchases, if offered, do not renew automatically. Included credits and usage rules are displayed before purchase. Privacy Policy: https://blynkai.app/cardify/privacy Cardify Terms of Service: https://blynkai.app/cardify/terms Apple Standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Silent Proof
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Prove your focus with verifiable proof. Silent Proof is the first app that creates tamper-evident proof of your phone non-usage during focus sessions. Whether you’re studying, working, or in a digital detox, you can show others—or yourself—that you stayed off your phone. How it works Create a focus session, lock your screen within 10 seconds, and keep it locked until the session ends. Silent Proof monitors your screen lock state and app usage in real time. When you’re done, you get a verifiable proof report with cryptographic hashing and device binding—so it can’t be faked. Verifiable proof Tamper-evident reports with SHA-256 cryptographic hashing Device-specific binding for authenticity Export as shareable PNG cards or detailed PDF reports (Pro) Full session metadata, including any violations and timestamps Analytics and insights Track daily and weekly silent minutes View your longest clean session streak Heatmap of your focus patterns over time Dashboard, Activity, and Insights tabs for a clear overview Smart violation detection The app records screen unlocks, app switches, and service interruptions during a session. Every violation is timestamped so your proof reflects exactly what happened. Privacy-first All data stays on your device. No cloud sync, no external servers. Your focus data is stored locally and protected by cryptographic hashing. Free and Pro Free: 3 focus sessions per day, PNG export Pro: Unlimited sessions and PDF export Note: Silent Proof monitors your phone usage to generate proof. It does not block apps or restrict access—it only records activity to create verifiable proof of focus time.
Screenshots
Verdict
The clearest difference is in-app purchases: Silent Proof at none against Cardify's 7. Cardify's advantage is update cadence (every 9 days vs every 4 months). 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
Both are free to download. Cardify sells 7 in-app purchases, starting at $9.99 per 7 days. Silent Proof asks for nothing beyond the download.
Cardify ships an update every 9 days, Silent Proof every 4 months. The most recent releases landed on October 31, 2026 and October 8, 2026 respectively.
| Parameter | Cardify | Silent Proof |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (12 ratings) — better | — |
| Positive reviews | 88.9% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 9 days — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 13 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Huishuo Mobile Technology Co.,Ltd. | Archana Pant |
In-app purchases
Cardify
- Weekly3 Days trial$9.997 Days
- Monthly Pro$19.991 Month
- Yearly$99.991 Year
- 100 Credits$1.99
- 300 Credits$4.99
- 500 Credits$7.99
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- Lifetime$199.99
Silent Proof
No in-app purchases








