Comparison

Sundae vs Roundi

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sundae

Features
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Time you can't see is time you can't feel. Sundae turns it into something you can watch — an ice cream that melts, a candle that burns down, a train that rides home. Start a session, set your phone down, and just glance. MADE FOR TIME BLINDNESS • Every second is visible: the scene is consumed smoothly in real time, on screen and on your Lock Screen • Live Activity + Dynamic Island: the melting sundae stays with you even when the phone is face up on your desk • Start in three seconds: two taps, no setup, no account NO GUILT. EVER. • Step away anytime — your session just naps. Nothing withers, nothing breaks, nothing is lost • Streaks only celebrate. Miss a day and the app simply says nothing • Rest counts: Lounge Mode is an official do-nothing timer. A sun sets over the sea while you lie flat. Finishing a rest keeps your streak alive A FRIEND, NOT A COACH • Pebble the sea otter waits with you, naps with you, and floats in the dessert lake when you finish • Write one thing ("Reply to Sam's email") and the whole app becomes about just that — even on your Lock Screen • Finished time becomes a collection of little dioramas ONE THING A DAY • Tell Sundae what you're working toward, and roughly how you'd get there • Each day it puts a single step on your Lock Screen — tap it and you're focusing • Skip one and it rotates to the next. Nothing is ever overdue, nothing accumulates • Never a list, never a checkbox, never a nag TWELVE SCENES, THREE UNIVERSES • Dessert: Sundae, Popsicle, Hot Cocoa, Cotton Candy • Flame: Candle, Campfire, Sparkler, Firefly Jar • Journey: Night Train, Sailboat, Balloon, Snail SOUND THAT ACTUALLY HELPS • Real rain and ocean recordings, crackling fireplace, summer crickets, brown noise • Gentle music-box chime when you finish — never an alarm PAY ONCE. YOURS FOREVER. • Free: full timer, Pebble, and three scenes • Sundae Full ($9.99, one-time): every scene, Lounge Mode, the full collection • Never a subscription PRIVATE BY DESIGN • Works completely offline. No account, no ads, no tracking, no data collected — the app has no networking capability at all

About

Roundi

This app encourages single-task focus by visualizing time as a disappearing color disc. It enforces focus by making leaving the app before a round ends costly. Users can create custom focus rituals and control it hands-free with voice commands.

Highlights
  • Visual time tracking
  • Single-task enforcement
  • Customizable focus rituals
  • Voice control with Siri
  • Apple Watch integration
  • Multiple visual themes
  • Focus streak tracking
Features
Read full description

One round, one thing. Roundi holds you to a single task and shows the time as color: focus you can see. Turn the dial, press start, and a disc of color begins to disappear — like a kitchen timer for your attention. No numbers counting down, no notifications pulling you back. Just time, visibly running out. THE ONE RULE Leave the app — or lock the screen — before the round ends, and the round is lost, instantly. That's the whole trick: Roundi doesn't block anything, it just makes leaving cost something. (Too strict? There's a Lenient mode.) MADE FOR YOUR RITUALS • Meditate — 15 quiet minutes, watching the color fade • Study — a 50-minute block with no pings • Work — deep work sessions up to 2 hours • Train — planks, dead hangs, rest between sets Save each ritual as a tag and it becomes a one-tap start button with its own duration. SAY IT, DON'T TAP IT "Start Plank in Roundi." Between rounds, Siri sets the length, starts a tag, adds another round, or tells you your streak. Hands free — and once a round starts, nothing interrupts you. ON YOUR WRIST Roundi runs on Apple Watch too. Turn the Digital Crown, tap START, and the color sweeps away on your wrist; a tap and a chime mark the end. Watch rounds land in your iPhone's calendar, Siri works on the watch, and one rule carries over: unlock your iPhone during a watch round and the round ends. A TIMER YOU'LL WANT TO LOOK AT Choose how time drains: a clockwise disc, a color that falls or rises across the whole screen, or a spiral coil that unwinds from the outside in. Six soft colors. A chime and a soft blink of color when the round completes. EVERY ROUND, KEPT Finished rounds land as dots on your calendar, with your daily total and streak. Time becomes habit; habit becomes you. PRIVATE BY DESIGN No account. No sign-up. Your rounds stay on your device. Set a time. Stay focused. One round at a time.

Screenshots

Sundae4 screens
Roundi4 screens

Verdict

The call

The clearest difference is in-app purchases: Roundi at none against Sundae's 1. Roundi also leads on update cadence (daily vs every 4 days) and device support (3 vs 1). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sundae sells 1 one-off in-app purchase. Roundi asks for nothing beyond the download.

UpkeepUpdate frequency

Sundae ships an update every 4 days, Roundi daily. The most recent releases landed on September 23, 2026 and September 28, 2026 respectively.

Scorecard3 real differences · 7 level
Sundae versus Roundi: the parameters behind the verdict, then further details
ParameterSundaeRoundi
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 4 daysDaily — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.016.0 — better
Further details — not scored
Size13 MB25 MB
Age rating4+4+
Developer飞 徐Yakppal, Inc.

In-app purchases

1 purchases

Sundae

One-time1
  • Sundae Full$9.99
None

Roundi

No in-app purchases

Questions

Is Sundae free?
Sundae is free to download, with in-app purchases available.
Is Roundi free?
Roundi is free to download, with no in-app purchases.
Do Sundae or Roundi have ads?
Neither Sundae nor Roundi shows ads.
Which is updated more often, Sundae or Roundi?
Sundae ships an update every 4 days, and Roundi daily. Most recently, Sundae was updated on September 23, 2026 and Roundi on September 28, 2026.

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