Comparison

HeyBLU vs Diamond Planner

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

Head to head
About

HeyBLU

This app transforms your iPhone into an objective strike zone for youth baseball and softball. It provides live audio calls for balls and strikes, tracks pitch data, and helps develop pitcher command and batter's eye.

Highlights
  • Live audio ball/strike calls
  • Adjustable strike zone
  • Pitch heatmaps and logs
  • Estimated velocity tracking
  • Command effectiveness rating
  • Pitcher performance tracking
  • Batter's eye development tool
Read full description

Every bullpen deserves BLU — Big League Umpire. HeyBLU turns the iPhone you already carry into an objective strike zone for youth baseball and fastpitch softball. Mount your phone, set the zone, and hear live “BALL” or “STRIKE” the moment the pitch crosses the plate. No radar gun. No smart baseball. No cell service or Wi‑Fi required. Built for real dirt fields. AFFORDABLE PRECISION TECH Umpire your bullpens all year long for about what it costs to hire a single ump for one game. Bucket Dads, Diamond Moms, Pitching Coaches and teams can get a consistent, objective zone for practices, bullpens, and scrimmages all season. ESTABLISH COMMAND Live Audio Calls: Instant ball or strike through your iPhone, Bluetooth speaker, or earbuds. Train to Your Zone: Adjust zone height and width for your league or age group. Every Pitch Tells a Story: Heatmaps and pitch logs show plate-crossing location, pitch count, and estimated velocity when the trajectory is strong enough to trust. NEW IN THIS VERSION 3D Replay Review just like the Bigs. Watch any single pitch, or see the entire bullpen from any angle. Baseball & Fastpitch: HeyBLU tracks 11-inch / 12-inch softballs as well as baseball. Follow Live: Share a live, read-only feed to a second device so coaches or parents can follow from the dugout or stands. Connect via WiFi and see pitch location from the stands. BUILD BETTER BALLPLAYERS Own the Zone (Command Center): On a second device, pick the intended location before the pitch. HeyBLU compares result to target and builds a command rating. Earn Your Innings: Save and compare pitcher performance over time to see who hits their spots. Solo Bullpens: Get instant audio feedback while throwing alone. Batter’s Eye: Give hitters a consistent zone so plate discipline isn’t “close enough.” Umpire Training: An objective reference for aspiring umpires — we empower umpires; we don’t replace them. START YOUR 14-DAY FREE TRIAL Try HeyBLU free for 14 days. Then subscribe for $12.99/month or $79.99/year (U.S.) to unlock unlimited pitcher profiles, command heatmaps, saved reports, and data exports. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel in Account Settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Privacy Policy: https://www.heyblu.ai/privacy Terms of Use: https://www.heyblu.ai/terms

About

Diamond Planner

This app helps youth baseball and softball coaches create batting orders and assign fielding positions. Visualize your lineup on an interactive field and collaborate with assistant coaches easily. Spend more time coaching and less time on administrative tasks.

Highlights
  • Drag-and-drop batting order creation
  • Interactive fielding position assignments
  • Inning-by-inning lineup visualization
  • Assistant coach collaboration via email
  • Supports all rostered players batting
Features
Read full description

Plan batting orders, assign fielding positions for every inning, and visualize your lineup on an interactive field — from anywhere. Built for youth baseball coaches who want to spend less time juggling spreadsheets and more time coaching. Perfect for baseball or softball. - Drag-and-Drop Batting Order: Build and reorder your lineup with a simple drag-and-drop interface. Every rostered player bats — no one gets left out. - Fielding Assignments: See every player's assignment on an interactive diamond. Flip through innings to confirm your plan at a glance. - Coach Collaboration: Invite assistant coaches by email. They get full read/write access to lineups — no extra accounts needed.

Screenshots

HeyBLU4 screens
Diamond Planner4 screens

Verdict

The call

The clearest difference is in-app purchases: Diamond Planner at none against HeyBLU's 2. Diamond Planner also leads on iOS requirement (15.1 vs 17.0). HeyBLU's advantage is update cadence (weekly vs every 3 weeks) and ratings volume (18 vs 2). On price, rating, review sentiment and ads 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. HeyBLU sells 2 in-app purchases, starting at $4.99 per month. Diamond Planner 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 HeyBLU against 5.0 for Diamond Planner. That said, the two scores are not equally well evidenced: HeyBLU has 18 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

HeyBLU ships an update weekly, Diamond Planner every 3 weeks. Both last shipped on September 23, 2026.

Scorecard5 real differences · 5 level
HeyBLU versus Diamond Planner: the parameters behind the verdict, then further details
ParameterHeyBLUDiamond Planner
PriceFreeFree
Rating4.9 (18 ratings)5.0 (2 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings18 — better2
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size79 MB31 MB
Age rating4+4+
DeveloperBig League Ballpark, IncBrian Ogilvie

Customer experience

HeyBLU

All ratings17 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Diamond Planner

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

HeyBLU

Subscriptions2
  • Pro Monthly14 Days trial$4.991 Month
  • Pro Annual14 Days trial$49.991 Year
None

Diamond Planner

No in-app purchases

Questions

Is HeyBLU free?
HeyBLU is free to download, with in-app purchases available.
Is Diamond Planner free?
Diamond Planner is free to download, with no in-app purchases.
Which has better reviews, HeyBLU or Diamond Planner?
Diamond Planner is rated higher. HeyBLU averages 4.9 out of 5 from 18 ratings, while Diamond Planner averages 5.0 from 2 ratings.
Do HeyBLU or Diamond Planner have ads?
Neither HeyBLU nor Diamond Planner shows ads.
Which is updated more often, HeyBLU or Diamond Planner?
HeyBLU ships an update weekly, and Diamond Planner every 3 weeks. Most recently, HeyBLU was updated on September 23, 2026 and Diamond Planner on September 23, 2026.

Other comparisons