Comparison

Height Predictor vs Tallwise

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

Head to head
About

Height Predictor

Features
Read full description

Estimates a child's adult height from the CDC stature-for-age charts plus both parents' heights. Shows a range, the percentile chart with your kid's dot on it, and the math behind the number. Every source is in the app. A Sources & references screen lists the CDC growth charts, the published papers behind the percentile and mid-parental steps, and the guidance behind each daily prompt, each one linked and saying which part of the app it backs. Log height a few times a year to follow the curve. There's a daily habit checklist and guided stretch routines with illustrated demos. Stretching is for posture and mobility; it does not change adult height. Works in cm or ft/in. Runs entirely on your phone. No account, no server, no analytics, no ads. Deleting your data in settings removes it completely. Heightcast is an estimate built from public growth references. It is not a diagnosis, not a medical device, and not a substitute for a pediatrician. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Tallwise

Features
Read full description

How tall will you be? Tallwise gives you a real answer from growth science, not a guess. WHAT IT DOES • Predicts your adult height from your age, height, weight, your parents' heights and your stage of growth, using the Khamis-Roche method and CDC growth charts • Shows a range with an honest error band, and updates the prediction every time you log a new height • Places you on the growth chart: see your percentile and your projected path to adulthood • Growth Score from sleep, protein, movement and a daily 10-minute posture and mobility routine • Works for teenagers, and for parents logging a child TALLWISE PLUS Plus unlocks your exact predicted number, monthly re-predictions, the Growth Score and the daily routine, and the share card. Monthly, yearly or lifetime, cancel any time. Prices are shown in the app and may vary by country. PRIVATE BY DESIGN No account. No ads. No tracking. Everything stays on your phone. Tallwise is not medical advice. Predictions are statistical estimates with a stated error range; talk to a doctor about growth concerns. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://alagicamir.github.io/korklar-legal/tallwise/privacy.html

Screenshots

Height Predictor4 screens
Tallwise4 screens

Verdict

The call

The clearest difference is iOS requirement: Height Predictor at 15.1 against Tallwise's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Height Predictor sells 2 in-app purchases, starting at $2.99 per 7 days and Tallwise sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Height Predictor ships an update every 3 days, Tallwise every 4 days. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Height Predictor versus Tallwise: the parameters behind the verdict, then further details
ParameterHeight PredictorTallwise
PriceFreeFree
Update frequencyEvery 3 days — betterEvery 4 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size38 MB8 MB
Age rating4+4+
DeveloperHan KimAmir Alagic

In-app purchases

2 purchases

Height Predictor

Subscriptions2
  • Weekly3 Days trial$2.997 Days
  • Yearly$19.991 Year
4 purchases

Tallwise

Subscriptions3
  • Plus Monthly$1.991 Month
  • Tallwise Plus$4.997 Days
  • Tallwise Plus3 Days trial$34.991 Year
One-time1
  • Plus Lifetime$19.99

Questions

Is Height Predictor free?
Height Predictor is free to download, with in-app purchases available.
Is Tallwise free?
Tallwise is free to download, with in-app purchases available.
Do Height Predictor or Tallwise have ads?
Neither Height Predictor nor Tallwise shows ads.
Which is updated more often, Height Predictor or Tallwise?
Height Predictor ships an update every 3 days, and Tallwise every 4 days. Most recently, Height Predictor was updated on October 3, 2026 and Tallwise on October 4, 2026.

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