PreviewBrowser vs Umka
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PreviewBrowser
This application serves as a specialized tool for educators to review test items on iOS devices. It is designed for use with the Level12 delivery platform and is not intended for general public access.
- Test item review
- iOS device compatibility
- Level12 platform integration
- Educator-specific tool
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Note *** This app is not intended for general public use. The Preview Browser is a tool used by selected educators to review test items on iOS devices for the Level12 delivery platform.
Umka
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A LITTLE MATH BEFORE A LITTLE MORE PLAY Approved app time is up, but your child wants a little more. Umka gives that moment one clear next step: a short K–8 math practice, then the extra break you set. HOW UMKA WORKS 1. You choose what Umka manages Select the apps, categories, or websites you want Umka to manage, then set the approved time. Apps you do not choose stay outside Umka's control. 2. Time is up. Math is next When the approved time is used up, your child can start a short learning break with math practice at the selected Kindergarten–Grade 8 level. 3. Practice complete. Extra break ready After your child completes the number of correct answers you set, Umka opens the extra time you chose. When that break ends, the selected apps pause again. BUILT FOR A CLEARER ROUTINE • A child-understandable path when approved time ends • Parent-chosen apps, time, and learning settings • Math practice from Kindergarten through Grade 8 • Question selection that can adjust across sessions using learning history stored on the device • Supportive feedback and room to try again • No streaks, badges, virtual coins, or leaderboards • No location, message, or browsing monitoring LEARNING STAYS ON THE DEVICE Your child's answers, performance, learning history, adaptive state, nickname, parent PIN, and Apple's opaque selected-app tokens stay on the device. Umka uses RevenueCat for subscription functionality, purchase restoration, support, fraud prevention, and purchase analytics. Child answers, performance, learning history, nickname, parent PIN, and selected-app tokens are not sent to RevenueCat. A FOCUSED TOOL, NOT A UNIVERSAL RULE Umka does not decide how much screen time is right for every child. It supports one optional routine inside the boundaries you choose. It does not lock the whole phone, replace a teacher, diagnose a child, or promise better grades or fewer disagreements. SUBSCRIPTION INFORMATION Umka offers Annual and Monthly auto-renewing subscription options. Both plans unlock the same features: parent-selected apps and approved time, K–8 math practice, and parent-set extra breaks. An active subscription is required after parent setup; there is no permanently free plan. Annual: $69.99 per year. Eligible subscribers receive a 1-week free trial, then the subscription renews annually. Monthly: $9.99 per month. No free trial. The subscription renews monthly. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the free trial or current billing period. Your Apple Account is charged for renewal within 24 hours before the end of the current period. Manage or cancel your subscription in Apple Account Settings. Terms of Use: https://learnwithumka.com/terms Privacy Policy: https://learnwithumka.com/privacy REQUIREMENTS • iPhone or iPad running iOS 17 or later • Screen Time / Family Controls permission • Parent setup required • An active subscription is required after parent setup Support: https://learnwithumka.com/support
Screenshots
Verdict
The clearest difference is in-app purchases: PreviewBrowser at none against Umka's 2. PreviewBrowser also leads on iOS requirement (14.0 vs 17.0). Umka's advantage is update cadence (every 5 days vs every 7 months). On price, ads 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. Umka sells 2 in-app purchases, starting at $9.99 per month. PreviewBrowser asks for nothing beyond the download.
PreviewBrowser ships an update every 7 months, Umka every 5 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | PreviewBrowser | Umka |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 7 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 50 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | NWEA | Sfumato Studios LLC |
In-app purchases
PreviewBrowser
No in-app purchases
Umka
- Umka Monthly$9.991 Month
- Umka Annual7 Days trial$69.991 Year









