# Backtrack Stack

> Backtrack Stack (iPhone/iPad app by The Frum Shopper, LLC.)

- Source: https://appshunter.io/ios/app/backtrack-stack/id6757606199 (this page in markdown: same URL + `.md`)
- Developer: [The Frum Shopper, LLC](https://appshunter.io/developer/1864373604)
- Category: Games
- Price: $49.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: English
- Released: 2026-01-24
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/backtrack-stack/id6757606199/reviews.md

## What is Backtrack Stack?

Backtrack Stack is a configurable N‑Back training app designed to help you practice working memory with multiple cue types.

Cues (can be configured):
 - Position (3×3 grid)
 - Audio letters (spoken)
- Color cue
- Haptics on supported devices

Training modes:
- Adaptive difficulty (d′/accuracy-based)
- Fixed N sessions
- Preset runs (one-tap fixed sessions)
- Optional per‑cue N (advanced)

Stats:
- Track hits, misses, false alarms, correct rejections, and d′ (d-prime) per cue and overall.

Backtrack Stack works great on iPad and iPhone, is highly configurable, and keeps controls simple so you can focus on the task.


## Version history (last 2 releases)

### 1.7 — 2026-04-21

Added exact recall option which tracks correct, wrong, or skipped.

### 1.0 — 2026-01-24

No release notes.

## More apps by The Frum Shopper, LLC

- [Frum Spot](https://appshunter.io/ios/app/frum-spot/id6757081626)

All apps by The Frum Shopper, LLC: https://appshunter.io/developer/1864373604

## Related topics

[backtrack stack](https://appshunter.io/ios/topics/backtrack-stack)

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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 2026-05-17.*