Comparison

Plank Timer by Axcentra vs BMI Calculator

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

Head to head
About

Plank Timer by Axcentra

This app helps you build core strength with timed plank exercises. It offers custom interval settings, audio cues, and progress tracking for consistent workouts. Suitable for all levels, it requires no equipment and includes various plank types.

Highlights
  • Customizable plank intervals
  • Audio-guided workout cues
  • 30-day plank challenge plans
  • Progress and streak tracking
  • Multiple plank variations
  • No equipment required
Features
Read full description

Plank Timer is a plank timer, workout timer, and exercise timer built for planks, core workouts, and 30-day plank challenges. Create custom intervals, follow clear audio cues, and track streaks so you stay consistent—whether you’re doing a quick home workout or a structured training plan. Train smarter with Plank Timer Plank & core workout timer: perfect for planks, abs training, and stability work - Custom intervals: set work/rest, repeats, difficulty, and auto-progressions - Plank challenge plans: beginner to advanced 30-day plank challenge programs - Audio-guided training: start, rest, and switch with clear cues - Progress & streaks: workout history, personal bests, and daily reminders - Share & compete: share results and challenge friends for accountability - No equipment needed: effective workouts in minutes a day How it works - Pick a preset plan or create your own interval timer routine - Start your workout and follow the guided sets + rests - Track progress, protect your streak, and level up over time Plank variations included Target different muscles with standard and side planks, elbow planks, plus harder holds as you improve. Whether you’re starting your first plank challenge or leveling up your core routine, Plank Timer makes training simple, effective, and consistent.

About

BMI Calculator

Features
Read full description

Get your BMI in seconds. Type in your height and weight. You get your BMI, your healthy range, a body fat estimate (US Navy method), plus BMR and TDEE. Most BMI apps stop there. If your number isn't where you want it, this one keeps going: it turns your result into an actual plan. YOUR PERSONAL 12-WEEK WEIGHT PLAN • A daily calorie budget computed from your own TDEE – not a generic 1,200-calorie template • A projected weight curve: see the date you reach your goal at a safe 0.5–1 lb per week • 84 tiny daily lessons – why crash diets bounce back, what to do after a bad weekend, how to actually keep weight off. Under 3 minutes each • Daily habit check-ins – one reminder a day, not twelve, and you can shut it off • A weight tracker with a smoothed trend line, so one salty dinner never ruins your week • Widgets for your Home Screen and Lock Screen • After week 12: the Maintenance Year – one short lesson a month for the part where the weight stays off CALCULATORS INCLUDED • BMI with WHO categories and healthy range • BMR (Mifflin-St Jeor) and TDEE with five activity levels • Body fat % (US Navy method) and ideal weight range • Metric and imperial – kg, lbs, cm, ft/in PRIVATE BY DESIGN Your height, weight, BMI and answers are calculated and stored on your iPhone, and never leave it. There is no account and no cloud sync. The app sends anonymous usage data – which screens you open, and whether a purchase succeeded – so we can improve it; you can switch that off in Settings. Optional Apple Health sync (read weight from your smart scale, write BMI back) – your Health data never leaves your device. WEIGHT PLAN PRO The calculators are always available, full stop. Pro is the plan on top: the 12-week program, lessons, goal-date projection, habit check-ins, and the widget. BMI is a screening measure and this app does not provide medical advice; consult a healthcare professional before starting any weight-loss program. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://resonancelogic.com/bmiplan/privacy

Screenshots

Plank Timer by Axcentra4 screens
BMI Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Plank Timer by Axcentra at none against BMI Calculator's 4. BMI Calculator's advantage is ads (none vs shown). On price, update cadence, device support 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. BMI Calculator sells 4 in-app purchases, starting at $9.99 per month. Plank Timer by Axcentra asks for nothing beyond the download.

UpkeepUpdate frequency

Plank Timer by Axcentra ships an update weekly, BMI Calculator every 3 days. The most recent releases landed on November 5, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
Plank Timer by Axcentra versus BMI Calculator: the parameters behind the verdict, then further details
ParameterPlank Timer by AxcentraBMI Calculator
PriceFreeFree
Rating4.9 (25 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings25 — better—
Update frequencyWeeklyEvery 3 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhoneiPhone
Requires iOS17.416.4 — better
Further details — not scored
Size34 MB62 MB
Age rating4+12+
DeveloperAxcentra FitnessResonance Logic, LLC

In-app purchases

None

Plank Timer by Axcentra

No in-app purchases

4 purchases

BMI Calculator

Subscriptions1
  • Weight Plan Pro Monthly7 Days trial$9.991 Month
One-time3
  • Weight Plan Pro Lifetime$19.99
  • Weight Plan Pro Lifetime$29.99
  • Weight Plan Pro Lifetime$49.99

Questions

Is Plank Timer by Axcentra free?
Plank Timer by Axcentra is free to download, with no in-app purchases.
Is BMI Calculator free?
BMI Calculator is free to download, with in-app purchases available.
Do Plank Timer by Axcentra or BMI Calculator have ads?
Plank Timer by Axcentra shows ads; BMI Calculator does not.
Which is updated more often, Plank Timer by Axcentra or BMI Calculator?
Plank Timer by Axcentra ships an update weekly, and BMI Calculator every 3 days. Most recently, Plank Timer by Axcentra was updated on November 5, 2026 and BMI Calculator on October 29, 2026.

Other comparisons