Comparison

Modii vs Sundial

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

Head to head
About

Modii

Features
Read full description

Modii focuses on health-related data and shows health data to users in a clearer and easier way, so that users can better understand their own situation and quickly understand various indicators from various data. 1. Mdii can display the number and distance of walking every day, set weekly goals and record whether the goal is completed every day, so as to urge yourself to complete the exercise goal. 2. Modii can calculate and display the daily calorie consumption. Similarly, it can also set the daily consumption target. 3. Modii also provides a water recording function, which can record how much water you drink at each time, so that at any time, you can check whether your water consumption has reached a healthy level. 4, Modii also provides the view of sleep time, for people who use the watch to record sleep time, this can be convenient to check the sleep time. If you encounter any problems during use, please send feedback to the following email: knowtimefeeback@163.com If you have any suggestions, please use the email above. If you like the app, feel free to leave a comment.

About

Sundial

This app helps you manage your screen time by setting limits on app usage. It uses iOS's built-in blocking features and provides insights into your daily usage patterns. The app focuses on a more natural approach to time management, offering flexibility within set boundaries.

Highlights
  • App and category limits
  • Customizable rule reasons
  • Flexible exit options
  • Daily health score visualization
  • Usage history heatmap
  • Home Screen widget
Features
Read full description

Sundial is a screen time app built on one idea: a limit should feel like a sundial, not a stopwatch. You decide what your time is for, and the app quietly holds the line. LIMITS THAT ACTUALLY SHIELD Choose the apps or categories that eat your day and give each rule a daily allowance. When it runs out, iOS itself blocks the app — not a timer you can swipe away. One rule can hold any number of apps at once. THE BLOCK TELLS YOU WHY Every shield says what you finished ("30 min done for today.") and repeats the reason you set that rule — "For my health. Put the phone down." The exit stays yours as well: finish for today, take 15 more minutes, or lift that rule until midnight. Nothing is a dead end. TODAY, AT A GLANCE The home tab estimates how much of the day you have spent and turns it into a health score that drains as the hours do. The day's ink-wash landscape shifts with it, so the picture tells the story before the number does. HISTORY WORTH READING All history in one heatmap, plus a per-day breakdown of where the time went: which apps, which categories, and how they compare with your limits. THE HOME SCREEN WIDGET Today's figure and your most urgent rules, small or medium, right on the Home Screen. QUIET BY DESIGN Everything stays on your iPhone. No account, no server, no analytics, no ads. Sundial reads only aggregate usage time through Apple's Screen Time framework — never what you do inside an app. Full policy: see the Privacy Policy link below. SUNDIAL PRO A single one-time purchase unlocks every theme, every background scene, and the Home Screen widget. No subscription. REQUIREMENTS Sundial needs Screen Time permission (Settings → Screen Time → Sundial) to read your totals and set limits. iPhone.

Screenshots

Modii4 screens
Sundial4 screens

Verdict

The call

The clearest difference is in-app purchases: Modii at none against Sundial's 1. Modii also leads on iOS requirement (16.0 vs 18.5). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Modii versus Sundial: the parameters behind the verdict, then further details
ParameterModiiSundial
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 10 daysEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS16.0 — better18.5
Further details — not scored
Size3 MB30 MB
Age rating4+4+
Developer晓伟 庄潇 左

In-app purchases

None

Modii

No in-app purchases

1 purchases

Sundial

One-time1
  • Sundial Pro$4.99

Questions

Is Modii free?
Modii is free to download, with no in-app purchases.
Is Sundial free?
Sundial is free to download, with in-app purchases available.
Do Modii or Sundial have ads?
Neither Modii nor Sundial shows ads.
Which is updated more often, Modii or Sundial?
Modii ships an update every 10 days, and Sundial every 10 days. Most recently, Modii was updated on October 27, 2026 and Sundial on October 25, 2026.

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