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

HeyBLU is a live, 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. Make your next bullpen count with BLU/Big League Umpire. No radar gun. No sensors in balls. No cell service or Wi‑Fi required. Built for any outdoor field including your backyard. AFFORDABLE PRECISION TECH Train command with your bullpen umpire what it costs to hire one umpire, or one pitching lesson. Bucket Dads, Diamond Moms, Pitching Coaches and teams, track your progress with heatmap reports after every bullpen. ESTABLISH COMMAND Size the strike zone, hit your target, hear instant BALL or STRIKE through your iPhone, or connect a Bluetooth speaker, or earbuds. Train to Your Zone: HeyBLU's zone is adjustable to make it more or less challenging to get strikes, or to match the zone you expect on game day. Every Pitch Tells a Story: Heatmaps in both 2D and 3D Replays, just like the Pors. Every pitch logs plate-crossing location, pitch count, and estimated velocity. NEW IN THIS VERSION • Share reports straight to Instagram. • Sharper fastpitch softball calls. • Spreadsheet data now in feet and inches. Keep the suggestions coming — HeyBLU gets better with every bullpen SELECT YOUR SPORT: Baseball & plus 11-inch or 12-inch softball tracking. Follow Live: With a 2nd iPhone or iPad fans can follow along. COMMAND TRAINING TOOL With a 2nd iPhone or iPad coaches or player can pick the intended location before the pitch. HeyBLU compares result to target and builds a sharable command rating report. 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. Not at the field yet? Download, select a reminder, and your trial doesn't begin until you're ready. 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 4. Diamond Planner also leads on iOS requirement (15.1 vs 17.0). HeyBLU's advantage is update cadence (every 8 days vs every 3 weeks) and ratings volume (22 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 4 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 — 5.0 for HeyBLU against 5.0 for Diamond Planner. That said, the two scores are not equally well evidenced: HeyBLU has 22 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 every 8 days, Diamond Planner every 3 weeks. The most recent releases landed on November 4, 2026 and November 13, 2026 respectively.

Scorecard5 real differences · 5 level
HeyBLU versus Diamond Planner: the parameters behind the verdict, then further details
ParameterHeyBLUDiamond Planner
PriceFreeFree
Rating5.0 (22 ratings)5.0 (2 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings22 — better2
Update frequencyEvery 8 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size78 MB34 MB
Age rating4+4+
DeveloperBig League Ballpark, IncBrian Ogilvie

Customer experience

HeyBLU

All ratings19 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

4 purchases

HeyBLU

Subscriptions4
  • Pro Monthly14 Days trial$4.991 Month
  • HeyBLU Pro Monthly14 Days trial$12.991 Month
  • Pro Annual14 Days trial$49.991 Year
Show 1 more
  • HeyBLU Pro14 Days trial$79.991 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 5.0 out of 5 from 22 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 every 8 days, and Diamond Planner every 3 weeks. Most recently, HeyBLU was updated on November 4, 2026 and Diamond Planner on November 13, 2026.

Other comparisons