App Overview

DataJot icon

DataJot

Arthur BABEY · Productivity

DataJot is the simple, private app for tracking the measurements that matter to you.

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
2 ratings · Top 5%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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Combine features and design from your favorite apps.

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What's included15 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for DataJot: map the core Productivity workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Implement a robust categorization and tagging system.

Assumption to check: Users often find it hard to organize notes effectively.

Validate with people who use this workflow before building.

Hypothesis 2

Use quick add options with natural language processing.

Assumption to check: Note-taking can feel slow if there are too many steps.

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize colors and layouts.

Assumption to check: Limited customization options for notes and categories.

Validate with people who use this workflow before building.

Hypothesis 4

Integrate cloud sync for accessibility.

Assumption to check: No way to sync notes across devices.

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

DataJot is the simple, private app for tracking the measurements that matter to you. Room temperature, humidity, consumption, budget, workouts, sleep, mood, coffee, counters, routines, or small personal experiments: DataJot helps you record values over time, then turn them into clear trends without opening a spreadsheet for every tracker. Create a series, choose a unit, add measurements in seconds, and let DataJot build a readable view of what is really changing. You stay in control: each tracker can remain simple or become more precise with statistics, thresholds, colors, and custom charts. Flexible tracking, built around your own use cases DataJot does not force a method on you. Create the series you need, organize them with categories, and use ready-made templates to get started faster. Personal measurements, habits, home sensor readings, recurring quantities, or productivity indicators: you decide what is worth observing. Charts that make your data useful View your values as line, area, bar, or point charts. Check changes across different ranges, from day to year, then move through time by scrolling the chart or using the period navigator. Adjust the display, choose visible statistics, and more easily spot variations, averages, extremes, or cumulative totals. When a single value is not enough, add custom thresholds with labels, colors, and axis bounds. DataJot can also show the distribution of your measurements by threshold, helping you understand how much of your data falls into each zone. Import and export across your series Import or export measurements from multiple series in a single CSV operation. Move your data or continue analyzing it with your own tools without repeating the same action for every series. Made for the Apple ecosystem Quickly add a measurement from a widget, view recent charts, and use the Shortcuts app to create series, add values, export data, or fetch your latest aggregates. On Mac, an optional local HTTP server also lets you add or fetch measurements from your own tools. Your data, your rhythm DataJot works without ads and without subscriptions. One purchase gives you the app on iPhone, iPad, and Mac. iCloud sync can keep your trackers available across your Apple devices while keeping your data under your control. DataJot is made for people who want to understand their numbers without complexity: record what happens, see what changes, and build a clear memory of their personal measurements over time.

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Supabase
react-native-paper
react-native-gesture-handler
BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.