CardStar vs Screen Time Control
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CardStar
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CardStar is a modern flash card app for iPhone, iPad and Apple Silicon Mac that helps you create and organize cards and study card sets your way. Create cards and organize them into separate card sets for different topics, subjects or projects. Use CardStar for learning, revision, languages, facts, reference collections and much more. CardStar also includes powerful quiz features and on-device AI card generation on devices with Apple Intelligence enabled. Generate complete study sets from your own prompt, review the results and save them as a new card set. Whether you want to build your own study system manually or speed things up with AI, CardStar gives you a flexible way to manage and practice your cards across your devices. Key Features: • Create flash cards with title and content • Organize cards into separate card sets • Search across card titles and content • View all card titles in list view with sorting options • Print or export all or selected cards • Study with Quiz Mode (tap to reveal) • Use normal and reverse quiz directions • Mark cards for review in quiz mode • Import cards from plain Text or CSV files • Backup and restore your complete card library • Initial on-device AI card set generation on devices with Apple Intelligence enabled • Available on iPhone, iPad and Apple Silicon Mac CardStar Pro features: • Unlimited AI card sets and AI additions • Multiple Choice quiz mode • Guided AI templates with ready-to-edit prompts • Study stats and quiz history • Weak-card insights and review • Retry Missed Questions • Timed multiple choice • RTF import for rich text study notes
Screen Time Control
This app helps you reclaim your time by blocking distracting applications and categories. Set daily goals, start focus sessions, and build streaks to protect your attention and spend more time on what matters.
- Set daily time goals
- Block distracting apps and categories
- Start focus sessions
- Build streaks for momentum
- Track progress and reclaim time
- Create boundaries between impulse and intention
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Vow helps you take your time back. When distraction starts pulling you away, Vow helps you pause, protect your attention, and stay with the promise you made to yourself. Set the time you want back each day, choose what matters most, and block the apps that usually break your focus. Vow is built for people who want more than another productivity tool. It is designed to help you create a cleaner boundary between impulse and intention, so you can spend more time on the life you actually want. With Vow, you can: - Set a daily time goal for the minutes you want to reclaim - Choose the apps and categories that pull you off track - Start focus sessions that block distractions when it matters most - Build streaks and protect your momentum over time - See your progress and reclaim more of your day - Stay connected to your reason, not just your routine Whether you want to study with a clearer mind, work without breaking flow, sleep without the scroll, or make more time for what matters, Vow helps you hold the line. Take your time back. Keep your vow. ### You must upgrade to Pro to use this app. ### Subscription Details - Payment: Charged to your iTunes account at confirmation of purchase. - Auto-renewal: Subscription renews automatically unless turned off at least 24 hours before the end of the current period. - Renewal charge: Your account is charged within 24 hours before the end of the current period. - Manage subscription: You can manage subscriptions and turn off auto-renewal in Account Settings after purchase. - Cancellation and refunds: Managed directly by the store. - Free trial: Any unused portion of a free trial is forfeited after purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.kai7.app/p/privacy-policy-no-tracking.html
Screenshots
Verdict
The clearest difference is update cadence: Screen Time Control at every 3 days against CardStar's every 9 days. Screen Time Control also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support 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. CardStar sells 1 one-off in-app purchase and Screen Time Control sells 2 in-app purchases, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.
CardStar ships an update every 9 days, Screen Time Control every 3 days. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.
| Parameter | CardStar | Screen Time Control |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 9 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Subscription |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Wolfram Wacker | Kai Chi Tsao |
In-app purchases
CardStar
- CardStar Pro$0.99
Screen Time Control
- Vow Annual7 Days trial$19.991 Year
- Vow Lifetime$39.99









