# Strong Mind Estimator — Refine your estimation skills!

> Brain training app for estimation, processing speed, and decision-making confidence. (iPhone/iPad app by Donalee Markus.)

- Source: https://appshunter.io/ios/app/strong-mind-estimator/id1383404371 (this page in markdown: same URL + `.md`)
- Developer: [Donalee Markus](https://appshunter.io/developer/396769078)
- Category: Education, Games, Puzzle, Strategy
- Price: $29.99
- Rating: 1.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 169 MB
- Languages: English
- Released: 2019-04-06
- Data updated: 2026-06-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/strong-mind-estimator/id1383404371/reviews.md

## What is Strong Mind Estimator?

A clinical-grade brain training exercise that develops mental estimation, processing speed, and the cognitive confidence behind faster decision-making.

WHAT IT TRAINS

• Mental math and quick estimation

• Processing speed — the cognitive function that slows first with age

• Decision-making confidence under time pressure

• Numerical reasoning and approximation

• Carryover skills for daily judgment calls

WHY ESTIMATION MATTERS

Mental estimation is the cognitive shortcut behind nearly every quick decision — should I leave now to make the appointment, can I afford this purchase, will this fit in the trunk, how long until I need to refill. When this skill slows down, daily life becomes more effortful even when no individual decision is hard.

Estimation training is one of the most consistently responsive areas of cognitive training. Most users report subjective improvements within 2–4 weeks of consistent practice.

WHO IT'S FOR

• Adults 50+ wanting to maintain quick judgment

• Concussion and TBI recovery

• Professionals who make rapid decisions under pressure

• Students preparing for timed assessments

• Anyone who wants their inner calculator to work faster

THE SCIENCE

Strong Mind Estimator is built on the same three-pillar model — Attention, Intention, Rehearsal — that anchors Dr. Markus's broader work. The exercises are hierarchical, with progressive difficulty designed to push processing speed at the edge of current capacity.

ABOUT THE DEVELOPER

Dr. Donalee Markus has practiced cognitive restructuring since 1983 and is featured in Clark Elliott's "The Ghost in My Brain."

## Key features

- Mental math and quick estimation
- Processing speed enhancement
- Decision-making confidence
- Numerical reasoning
- Cognitive training science
- Progressive difficulty

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/strong-mind-estimator/id1383404371/reviews.md

### 1/5 — Useless without further instructions and a way to see progress over time

*2025-01-30*

The instructions page explains some of the science behind learning to estimate, but it doesn’t explain how that applies to this app. I don’t understand how to tell if I’m improving when there is no way to see historical results or trends.

It seems the doctor who prescribed this $30 game has never played around with it herself to see how useful it is. It seems she was told by the app maker that it would help patients and the doctor just took the creator at their word. It feels like a scam to me. I do not recommend spending any money on this app as of early 2025.

### 1/5 — Color Issue

*2022-11-28*

The type when results are displayed is white on graph white. You can’t read. Need to fix this.

**Developer response:** Thank you for your feedback. This has been fixed in the current version.

## Frequently asked questions about Strong Mind Estimator

### What is the price of Strong Mind Estimator?

Strong Mind Estimator is a paid application, priced at $29.99. This one-time purchase grants access to its full suite of cognitive training exercises.

### What devices does Strong Mind Estimator support?

Currently, Strong Mind Estimator is supported on iPad devices. Compatibility with other platforms may be considered for future updates.

### How often is Strong Mind Estimator updated?

The app was last updated on May 11, 2026, indicating a recent update. Developers typically release updates to improve performance and add features.

### What is the age rating for Strong Mind Estimator?

Strong Mind Estimator has an age rating of 4+. This suggests it is suitable for a wide range of users, from younger individuals to adults.

### Does Strong Mind Estimator offer a free trial?

As a paid application, Strong Mind Estimator does not appear to offer a free trial. The purchase price of $29.99 provides full access to the app's features.

### What learning methodology does Strong Mind Estimator use?

Strong Mind Estimator is built on a three-pillar model: Attention, Intention, and Rehearsal. This approach is designed to progressively challenge users and enhance their cognitive functions.

### How quickly can users expect to see improvements with Strong Mind Estimator?

Most users report subjective improvements within 2–4 weeks of consistent practice. This timeframe highlights the effectiveness of regular engagement with the estimation exercises.

### Does Strong Mind Estimator have ads?

No, Strong Mind Estimator does not contain advertisements. As a paid application, it provides an uninterrupted user experience focused on cognitive training.

## Version history (last 5 releases)

### 1.6 — 2026-05-11

What's New

• Updated estimation library
• Improved difficulty progression
• Stability fixes

### 1.5 — 2024-04-03

- Updated label displays

### 1.4 — 2024-03-14

- bug fixes

### 1.3 — 2022-07-17

- updated display view bug on smaller iPads

### 1.2 — 2019-09-12

- Fraction Display Bug fixes
- UI Fixes

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## More apps by Donalee Markus

- [Strong Mind Puzzles](https://appshunter.io/ios/app/strong-mind-puzzles/id396769075)
- [BYOPuzzles](https://appshunter.io/ios/app/byopuzzles/id695457968)
- [Strong Mind Mazes](https://appshunter.io/ios/app/strong-mind-mazes/id1141474443)
- [Rocket ABCs Print](https://appshunter.io/ios/app/rocket-abcs-print/id1270346054)
- [Rocket 123s](https://appshunter.io/ios/app/rocket-123s/id1304335839)

All apps by Donalee Markus: https://appshunter.io/developer/396769078

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*