Comparison

SIMTA vs Roundi

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

Head to head
About

SIMTA

This app visually represents time passing by filling your screen with color that drains away. It's designed for at-a-glance understanding, allowing you to gauge remaining time without reading numbers. Unlock additional colors and features with a one-time purchase.

Highlights
  • Visual time representation
  • At-a-glance time tracking
  • Customizable colors (Pro)
  • App distraction locking (Pro)
  • Lock screen and Dynamic Island integration
  • Screen awake functionality
  • Reliable countdowns
Features
Read full description

SIMTA is a timer you read at a glance. Set a time and the whole screen fills with color. As the seconds run out the color drains away, so you can tell how much is left from across the room without reading a number. SIMPLE BY DESIGN • Spin the dial, press start. That is the whole setup. • No accounts and no subscriptions. • Red and Teal are free. SIMTA Pro adds thirteen more colors, and My Colors lets you pick any color yourself. SIMTA PRO — ONE PURCHASE, NOT A SUBSCRIPTION • Thirteen more colors, plus My Colors for picking your own, with the home screen icon to match. • Lock the apps that distract you while a timer runs. • Every time you have run, kept in Recent. • No ads. MADE TO BE GLANCED AT • Horizon Lock keeps the color level with the room as you tip the phone or prop it in a stand. • The controls fade away once the timer is running, so nothing sits on top of the color. • Hide the digits entirely if you only want the color. • Keep the screen awake while a timer runs. • The countdown carries on to the Lock Screen and the Dynamic Island, with pause, resume and stop right there. RELIABLE • The countdown stays accurate after you switch apps or lock the phone. • A running timer survives the app being closed. • The alarm is audible even with the silent switch on. Good for cooking, focus sprints, workouts, study blocks, and anything where you would rather feel time pass than watch a number. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Roundi

This app encourages single-task focus by visually representing time as a disappearing color disc. It enforces a single rule: leaving the app before the timer ends results in a lost round, promoting deep work and habit formation. It offers customizable rituals and hands-free Siri integration.

Highlights
  • Visual time representation
  • Single-task enforcement
  • Customizable focus rituals
  • Siri integration
  • Apple Watch support
  • Calendar integration
  • Privacy-focused design
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

SIMTA4 screens
Roundi4 screens

Verdict

The call

The clearest difference is in-app purchases: Roundi at none against SIMTA's 2. Roundi also leads on ads (none vs shown) and ratings volume (3 vs 1). SIMTA's advantage is review sentiment (100% vs 80%). On price, rating, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SIMTA sells 2 one-off in-app purchases. Roundi asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for SIMTA against 5.0 for Roundi. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 100% of SIMTA's written reviews are positive against 80% of Roundi's.

UpkeepUpdate frequency

SIMTA ships an update every 3 days, Roundi every 2 days. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

Scorecard6 real differences · 4 level
SIMTA versus Roundi: the parameters behind the verdict, then further details
ParameterSIMTARoundi
PriceFreeFree
Rating5.0 (1 ratings)5.0 (3 ratings)
Positive reviews100.0% of reviews — better80.0% of reviews
Number of ratings13 — better
Update frequencyEvery 3 daysEvery 2 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac, Apple Watch — better
Requires iOS18.016.0 — better
Further details — not scored
Size32 MB30 MB
Age rating4+4+
DeveloperOurBeomYakppal, Inc.

Customer experience

SIMTA

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Roundi

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

2 purchases

SIMTA

One-time2
  • SIMTA PRO for 1 Week$0.99
  • SIMTA Pro$4.99
None

Roundi

No in-app purchases

Questions

Is SIMTA free?
SIMTA is free to download, with in-app purchases available.
Is Roundi free?
Roundi is free to download, with no in-app purchases.
Which has better reviews, SIMTA or Roundi?
SIMTA and Roundi are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.
Do SIMTA or Roundi have ads?
SIMTA shows ads; Roundi does not.
Which is updated more often, SIMTA or Roundi?
SIMTA ships an update every 3 days, and Roundi every 2 days. Most recently, SIMTA was updated on November 4, 2026 and Roundi on November 8, 2026.

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