Comparison

Heat Check vs CallupTracker

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

Head to head
About

Heat Check

This app provides real-time player performance rankings and customizable alerts for live sports games. It focuses on current momentum rather than final scores, offering insights into player activity and market data.

Highlights
  • Live ranked player performance board
  • Real-time heat index for players
  • Customizable alerts with adjustable intensity
  • Market data from Kalshi Research
  • Live Activities and Dynamic Island integration
  • Account-free alert option
Features
Read full description

Heat Check - know who's hot, while it's still happening. Every other sports app is built around the final score. Heat Check is built around the run. THE HEATER BOARD A live, ranked list of the hottest players on right now - NBA, MLB and NFL - reordering itself as the night moves. Someone catches fire in the third and climbs. Someone sits and slides. There's a board per league and an All board that merges them, which answers the question nothing else does: out of everything on television right now, where should I be looking? THE HEAT INDEX One live number per player, weighted hard toward the last few minutes. It reads volume against efficiency, rewards streaks as they extend, counts all-around production, and factors in whether the game is actually close. And it cools - a player who sits or goes quiet drops, on a schedule. Heat that can't fade isn't heat. ALERTS WITH A VOLUME KNOB, NOT A SETTINGS MAZE One control, three settings: - Just the big ones: only the rare, nuclear nights - Keep me warm: players heating up, up to 8 an hour - Blow up my phone: every heater, no mercy The cap is enforced when alerts are sent, not estimated. When more happens than your setting allows, you get the best moments of the night, not the first ones to clear a threshold before your budget ran out. Pick your sports, set quiet hours, done. NEW: ALERTS WORK WITHOUT AN ACCOUNT Your phone registers itself on first launch. Choose your intensity and alerts start arriving: no email, no sign-up, nothing to fill in. Sign in later and everything you set up comes with you, merged rather than replaced. Signing in is now about having your list on every device, not about whether the app works. NEW: SEE WHAT YOUR ALERTS ARE DOING Your profile now shows the night: how many you've been sent, this hour against your budget as a slot meter, a by-hour breakdown, and the last alert you got. When we don't have the figures, it says so rather than showing you a zero. MARKET DATA FROM KALSHI RESEARCH - DISPLAY ONLY See what the market thinks next to what the players are doing. Live win probability on game cards with the margin stripped out and movement since the current half-inning or quarter. Player prop markets in Insights: the current number, the best available on each side with the book named, where it sat at kickoff, and how often recent games cleared it. Kalshi price ladders where they exist, each with its own freshness stamp. Every figure names its source - published consensus, an average across the books quoting it, or Kalshi - so you always know what you're reading. Nothing is tappable, there's no handoff and no account to fund: it's context, not a wager. One switch in your profile turns all of it off. LIVE ACTIVITIES AND DYNAMIC ISLAND Put a player's heat on your Lock Screen and leave your phone face-up. Photo, club colours, live line, and a heat bar that moves as the game does. You pick the phone up because something is happening, not to find out whether it is. ALSO INSIDE - Live scores and box scores across all three leagues, with native NFL weeks - Game insights that surface what matters instead of dumping every stat - Search across players and games - Follow any player into My Players: saved instantly, synced when you sign in - Import your fantasy roster from ESPN, Sleeper or MyFantasyLeague - Reactions and shareable player cards built for the group chat - Every club in its own brand colours, contrast-checked to stay readable IT WORKS BEFORE YOU SIGN UP The board, the scores, search and following players all work on first launch. Make an account when you want your list on a second device. Stop finding out after. Heat Check tells you while there's still time to watch.

About

CallupTracker

Track official rookie-eligible baseball player call-ups to the major leagues. The app automatically refreshes upon opening to provide the latest news. Filter by your favorite team or view call-ups from a specific date.

Highlights
  • Lists official rookie call-ups
  • Automatic real-time refresh
  • Team-specific filtering
  • Date selection for historical data
  • Supports iPhone and iPad
Features
Read full description

List any rookie-eligible baseball player called up to the major leagues that day. Does not work with rumors, but once a team announces, it reports. No need to refresh, every time you open the app it refreshes to ensure you get the latest news. Select your team to see only players for that team. Pick a different date to see who was called up that day.

Screenshots

Heat Check4 screens
CallupTracker3 screens

Verdict

The call

The clearest difference is in-app purchases: Heat Check at none against CallupTracker's 3. Heat Check also leads on ratings volume (16 vs 2). CallupTracker's advantage is ads (none vs shown) and update cadence (every 6 days vs every 2 weeks). On price, rating 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. CallupTracker sells 3 one-off in-app purchases. Heat Check asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Heat Check against 5.0 for CallupTracker. That said, the two scores are not equally well evidenced: Heat Check has 16 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Heat Check ships an update every 2 weeks, CallupTracker every 6 days. Both last shipped on November 5, 2026.

Scorecard6 real differences · 4 level
Heat Check versus CallupTracker: the parameters behind the verdict, then further details
ParameterHeat CheckCallupTracker
PriceFreeFree
Rating4.9 (16 ratings)5.0 (2 ratings) — better
Positive reviews90.9% of reviews—
Number of ratings16 — better2
Update frequencyEvery 2 weeksEvery 6 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supportedFree — better
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS18.017.0 — better
Further details — not scored
Size30 MB2 MB
Age rating4+4+
DeveloperHeat Check AI LLCNicolas Richards

Customer experience

Heat Check

All ratings16 ratings
Positive93.8%
Neutral6.3%
Negative0.0%
Written reviews11 reviews
Positive90.9%
Neutral9.1%
Negative0.0%

CallupTracker

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Heat Check

No in-app purchases

3 purchases

CallupTracker

One-time3
  • Small Tip$1.99
  • Medium Tip$3.99
  • Large Tip$4.99

Questions

Is Heat Check free?
Heat Check is free to download, with no in-app purchases.
Is CallupTracker free?
CallupTracker is free to download, with in-app purchases available.
Which has better reviews, Heat Check or CallupTracker?
CallupTracker is rated higher. Heat Check averages 4.9 out of 5 from 16 ratings, while CallupTracker averages 5.0 from 2 ratings.
Do Heat Check or CallupTracker have ads?
Heat Check shows ads; CallupTracker does not.
Which is updated more often, Heat Check or CallupTracker?
Heat Check ships an update every 2 weeks, and CallupTracker every 6 days. Most recently, Heat Check was updated on November 5, 2026 and CallupTracker on November 5, 2026.

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