HulpSint vs Fluid Frontier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HulpSint
Engage with a beloved holiday figure through simulated calls, voicemails, and messages. Parents can use it to interact with children, offering encouragement or playful admonishments. Features include personalized calls, book entries, and interactive chats.
- Simulated calls from Sinterklaas
- Voicemail messages from Sinterklaas
- App messaging with Sinterklaas
- Personalized messages for children
- Countdown to Pakjesavond
- Add children to Sinterklaas's book
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De leukste Sinterklaas-app van Nederland en België! Sinterklaas is zoals elk jaar weer bereikbaar op je mobiel of tablet. Perfect voor ouders om hun stoute (en lieve!) kinderen met Sinterklaas te laten bellen en appen*. Deze app bevat drie leuke en handige functies: -= De Sint belt op =- Laat de Sint opbellen* om een kind streng toe te spreken, of juist aan te moedigen! De reden voor het gesprek kan geselecteerd worden. De Sint kan ook Pakjesavond op een originele manier inluiden door te vertellen waar de pakjes liggen, of om te vertellen waar de eerste aanwijzing van de speurtocht ligt. -= Voicemail van Sinterklaas =- - Geef de namen van stoute, of juist lieve, kinderen door zodat de Sint ze in zijn Grote Boek kan schrijven - Hoor hoeveel nachtjes slapen het nog is tot Pakjesavond - Geef je verlanglijstje door aan Sinterklaas - Hoor wat de Sint aan het doen is - Laat een bericht achter -= Appen met de Sint =- Je kunt nu de Sint berichtjes sturen, en je krijgt meteen antwoord terug. De Sint is altijd in voor een leuk gesprek, dus vraag maar raak! -= Hulp nodig? =- Mail een duidelijke omschrijving van je probleem naar: hulp@belmetsint.nl * Deze app is puur bedoeld als entertainment, er wordt niet echt gebeld, geappt of gesms't. Gebruik van de app kost geen belminuten of sms-tegoed. Wel kan er sprake zijn van dataverkeer. Bepaalde functionaliteiten kunnen geactiveerd worden d.m.v. in-app aankopen. Over het abonnement • De betaling wordt in rekening gebracht op het moment van aankoop. • Het abonnement wordt automatisch verlengd tenzij automatisch verlengen ten minste 24 uur vóór het einde van de lopende periode is uitgeschakeld. • Uw account wordt binnen 24 uur vóór het einde van de lopende periode in rekening gebracht voor verlenging tegen de prijs die u bij de eerste aankoop hebt betaald. • Abonnementen kunnen worden beheerd en automatische verlenging kan worden uitgeschakeld door naar Mijn Account te gaan na aankoop. • Elk ongebruikt deel van een gratis proefperiode, indien aangeboden, zal worden verspeeld wanneer u het abonnement koopt. Gebruiksvoorwaarden: https://www.belmetsint.nl/voorwaarden.html Privacybeleid: https://www.belmetsint.nl/privacybeleid.html
Fluid Frontier
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Fluid Frontier is a real fluid dynamics simulation you can touch. Drag a finger through the dark and colour flows, curls, and settles the way real ink and smoke do. Leave it alone and it keeps breathing on its own, with quiet phases and lively ones, like weather. Fluid Frontier also runs on Mac computers with Apple silicon, where you stir the water with your mouse or trackpad. EIGHT MOODS, EACH A DIFFERENT PHYSICS Silk: graceful ribbons that follow your hand Smoke: incense columns rising and curling Ink: slow drops blooming in still water Nebula: cosmic clouds stirred by turbulence Tide: a rolling current that crosses the screen Lava: warm blobs drifting upward, soft and slow Vortex: one great spiral that pulls everything in Rain: threads falling and feathering apart SEVEN PALETTES Frontier teal and gold, Aurora, Sunset, Ocean, Ember, Neon, and Mono. Every mood works with every palette, so the canvas is yours to tune. WRITE INTO THE WATER Type a few words and they bloom in your palette's colours, then the current carries them away. Hold them and the water keeps them readable while it softens the edges. Turn on the clock and the time itself drifts by each minute. YOUR PHOTOS, PAINTED IN WATER Pick a photo and stir, and every swirl paints a little more of it into the water. Or splash the whole photo in at once and let it live there. Your photo stays on your device. It only leaves if you choose to send it, as a snapshot or tucked inside a living design you share. TWO QUIET GAMES, PLUS ONE FOR EVERYONE Ember run: stir the currents to carry a glowing ember through six rings, against the clock. Bubble pop: a few bubbles drift up at their own pace. Pop them with a slow current, for as long as you like. No clock, no score to chase. Daily ember: six new rings once a day. Keep your streak, share your time as a beautiful card. All of them ride the real physics. The water itself is the controller. CAPTURE AND POST Record up to thirty seconds of your water as a video, or take a snapshot, and share it straight from the app. Your designs also travel as a QR code friends can scan. SOUND MODE Turn it on and the water moves with your music: glow swells with the bass, bursts hit the beat. It listens live and never records or stores a thing. MAKE IT YOURS, THEN GIVE IT AWAY Sliders for drift, glow, swirl, fade, calm, brush, and power. Name a look you love and keep it in My designs. Send a design to a friend with one tap: friends with the app paste a short code and your exact water flows on their screen, friends without the app get a little file that plays in any browser, and on a computer a free wallpaper app can run it as a living desktop. Every gift can carry your words in the water. NOTHING WATCHING YOU No ads. No account. No tracking. Your words and photos stay on your device, unless you choose to send one. The water runs entirely on your screen, even in flight mode. WHAT IS FREE Three moods, three palettes, Bubble pop and a greeting to send are yours to keep, and sending a design to a friend is always free. One tap starts a free 3-day trial of everything. Own it forever (one payment) or the yearly plan (7 days free first if eligible) opens the rest: all eight moods, all seven palettes and your own colours, words and photos in the water, sound mode, the fine sliders, Ember run and the Daily ember, record and snapshot, and designs of your own to keep. Terms of Use: https://www.fluidfrontier.app/terms Privacy Policy: https://www.fluidfrontier.app/privacy Made by Nicola Harvey in Australia.
Screenshots
Verdict
The clearest difference is ads: Fluid Frontier at none against HulpSint's shown. Fluid Frontier also leads on update cadence (every 2 weeks vs every 2 months). On price, in-app purchases, 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. HulpSint sells 2 in-app purchases, starting at $3.99 per year and Fluid Frontier sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
HulpSint ships an update every 2 months, Fluid Frontier every 2 weeks. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.
| Parameter | HulpSint | Fluid Frontier |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (19 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 125 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | First Class Media B.V. | Nicola Harvey |
In-app purchases
HulpSint
- Premium Account$3.991 Year
- Activeer alle opties$0.99
Fluid Frontier
- Founding Monthly7 Days trial$1.991 Month
- Yearly plan7 Days trial$9.991 Year
- 3-day TrialFree
- Lifetime Unlock$14.99
Questions
Is HulpSint free?
Is Fluid Frontier free?
Do HulpSint or Fluid Frontier have ads?
Which is updated more often, HulpSint or Fluid Frontier?
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