Comparison

Spot o'clock vs HeartFan

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

Head to head
About

Spot o'clock

This app offers a unique way to tell time using colored spots instead of small numbers, ideal for those with vision impairments or who need to read the time from a distance. It provides an innovative, out-of-focus reading experience for analog time display.

Highlights
  • Read time out of focus
  • Colored spots for hour indication
  • Traditional analog minute display
  • Optimized for iOS features
  • Keeps screen on for bedside use
  • Auto orientation support
  • Apple Watch companion app
Features
Read full description

Overview: Spot o’clock is a unique clock designed to be read out of focus. A fantastic innovation for people with poor vision and struggle to read traditional clocks without their corrective lenses. The clock face features a unique design where colored spots are arranged around the analog clock face, allowing users to read the time by position rather than clarity. Description: - Similar to reading a pair of six-sided dice, where the patterns are recognized rather than counting. - The current hour is interpreted by the position of the white spot among the visible red cornerstone spots.   - Just ahead of the current hour white spot is the place holder open circle that over rides the red cornerstones at 2,5,8,11 o'clock. - The open circle is critical to the clock function. - The minute is interpreted by the traditional position of analog clock hands. - Individuals can read Spot o’clock at a distance typical of a bedside nightstand or greater. Results may vary per individual. - Spot o’clock can also be easily read by active users who are physically on the go when small numbers are difficult to read in motion. iOS features: - Optimized for iOS18 + features - Spot o’clock on iPhone overrides screen sleep function to remain on for extended periods such as all night bedside clock or desk clock. - Please keep your device connected to power supply when doing so. - Auto orientation in either landscape or portrait modes. - Red underline below the clock face allows the user to identify which end is down to assist with auto orientation. Free version: - Ad banner - Utilizing only the base face for those who prefer a simple, less distracting display. - Apple Watch companion is a practical solution for users who need a reliable time-telling app without the fuss of reading small numbers. In app purchase Available: Unlocks pro features for those who prefer a bit more precision for all devices: iPhone, iPad and Apple Watch. - Red second hand (pro version) - Discrete hour indices (pro version) Visit www.spotoclock.com Watch the demo and read more about the Spot o’clock. A patented method of telling time by Luminosity Industries LLC.

About

HeartFan

Features
Read full description

Control your homekit devices during a workout. HeartFan allows you to control your fans and lights within your house based on your heart rate. This can be especially useful for indoor sports where you want your fan to go up when you start sweating. Also controlling the light when reaching your limits gives you an immersive extra motivation. Simply add the accessories, press start and go! The following services and data is accessed by the app: HealthKit: • Read Resting Heart rate (Optional, by default 60, used as minimum default control value 0%) • Read Date of Birth (Optional, by default 30, calculates the maximum heart rate based on your age, used as maximum control value 100%) • Read Heart rate (To read heart rate during the workout and control your HomeKit accessories between your min and max control value) • Read/Write Workout (To start a workout) HomeKit: • Control fans that have dynamic speed enabled. • Control lights that have brightness enabled.

Screenshots

Spot o'clock4 screens

Verdict

The call

The clearest difference is in-app purchases: HeartFan at none against Spot o'clock's 1. HeartFan also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). Spot o'clock's advantage is update cadence (every 5 weeks vs every 21 months). On price 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. Spot o'clock sells 1 one-off in-app purchase. HeartFan asks for nothing beyond the download.

UpkeepUpdate frequency

Spot o'clock ships an update every 5 weeks, HeartFan every 21 months. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Spot o'clock versus HeartFan: the parameters behind the verdict, then further details
ParameterSpot o'clockHeartFan
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 weeks — betterEvery 21 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPod, Apple Watch
Requires iOS17.613.0 — better
Further details — not scored
Size12 MB3 MB
Age rating4+4+
DeveloperLuminosity Industriesritterfeld.com

In-app purchases

1 purchases

Spot o'clock

One-time1
  • Spot o'clock Pro Features$1.99
None

HeartFan

No in-app purchases

Questions

Is Spot o'clock free?
Spot o'clock is free to download, with in-app purchases available.
Is HeartFan free?
HeartFan is free to download, with no in-app purchases.
Do Spot o'clock or HeartFan have ads?
Spot o'clock shows ads; HeartFan does not.
Which is updated more often, Spot o'clock or HeartFan?
Spot o'clock ships an update every 5 weeks, and HeartFan every 21 months. Most recently, Spot o'clock was updated on September 19, 2026 and HeartFan on September 10, 2026.

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