Toothbrush timer vs Rivers 4K
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Toothbrush timer
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Make toothbrushing fun! Transform the daily 2-minute routine into an exciting adventure for your kids. HOW IT WORKS: Watch as your child brushes to reveal a hidden picture! Every brushing session uncovers a new surprise image while fun nursery songs play along. FEATURES: - 135 beautiful images to discover - 135 collectible achievements to earn - 15 cheerful nursery songs - Up to 12 user profiles (perfect for families!) - Dentist-recommended 1 or 2-minute timer - Colorful animations that keep kids engaged - No ads, no in-app purchases - safe for children WHY PARENTS LOVE IT: - No more struggles at brushing time - Kids actually WANT to brush their teeth - Builds healthy dental habits early - Progress tracking for each child Download now and make toothbrushing the highlight of your child's day!
Rivers 4K
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Rivers 4K More than 30 different rivers Relax your eyes with this fantastic 4K Rivers! Do you want to put a river in your house? or maybe put it as wallpaper for your phone, iPad or Apple TV? Now with Ríos 4K it is possible. Download this application and enjoy with your partner or friends the relaxing 4K or HD images of a wonderful River for Apple TV, iPhone or iPad. Main features: Playback • 4K and HD videos • Endless loop playback • Shuffle mode • Background playback while using other apps • Sleep timer: video automatically stops when you fall asleep • Playback speed (0.25x to 2x) Large Screen • Compatible with Apple TV via AirPlay • Compatible with Chromecast for HD viewing on your TV Customization • 5 visual effects: snow, powder snow, rain, sparkles, and confetti • 4 display layouts: list, grid, single circle, or double circle • Bookmark your favorite videos for quick access • Dark mode support • Clock: display the clock on screen (digital/analog) • Appointments: display text on screen • Calendar: display upcoming calendar events Content • Over 30 different content options • New content added regularly Privacy Policy: http://kissappsl.com/pages/privacy-policy/ Terms of Use (EULA): http://kissappsl.com/terms-of-use/
Screenshots
Verdict
The clearest difference is in-app purchases: Toothbrush timer at none against Rivers 4K's 2. Rivers 4K's advantage is update cadence (every 3 months vs every 9 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
Toothbrush timer costs $0.99 and Rivers 4K $0.99 up front. Rivers 4K sells 2 in-app purchases, starting at $0.99 per month. Toothbrush timer asks for nothing beyond the download.
Toothbrush timer ships an update every 9 months, Rivers 4K every 3 months. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.
| Parameter | Toothbrush timer | Rivers 4K |
|---|---|---|
| Price | $0.99 | $0.99 |
| Update frequency | Every 9 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 194 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Grzegorz Kowalewski | KISSAPP, S.L. |
In-app purchases
Toothbrush timer
No in-app purchases
Rivers 4K
- Rivers Full Version$0.991 Month
- Rivers Full Version$8.991 Year
