Comparison

NeuroCal vs String Theory!

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

Head to head
About

NeuroCal

This planner is designed for individuals who find traditional systems overwhelming. It offers a calm space to capture thoughts and organize them naturally, without pressure or guilt. The app uses a minimalist interface and gentle features to reduce cognitive load and promote mental clarity.

Highlights
  • Natural thought capture
  • Automatic organization
  • Calm, minimalist interface
  • Week Focus Mode
  • Completed items fade away
  • Low friction, low anxiety design
Features
Read full description

NeuroCal — The planner for brains that don't fit in boxes NeuroCal is built for ADHD minds, and for anyone who feels overwhelmed by traditional calendars, rigid to-do lists, or complicated productivity systems. Instead of clutter, pressure, or endless categories, NeuroCal gives you a calm space to capture what's on your mind and let things organize themselves naturally. There are no red badges, no guilt, and no productivity shame — just a clearer head and a simpler way to think. NeuroCal feels different from the moment you start using it. Capture a thought however it arrives: type it, say it out loud, or snap a photo. No menus, no categories, no friction. Type the way you naturally think — a quick phrase, a time and date, or a messy stream of ideas — and NeuroCal gently interprets it. Write "coffee tomorrow 2pm" or "therapy Thursday at 4" and it understands, placing things where they belong. Point your camera at a flyer, a screenshot, or an invitation, and NeuroCal reads it and offers to turn it into a plan. Not ready to decide? Drop anything — a photo, a half-formed idea — into your Remember Pile, and come back to it when you have the headspace. Snap now, sort later. Your day is divided into Now and Upcoming. Anything without a date stays in your Now view. Anything with a date appears in a clean, simple timeline that helps you see what's ahead without overwhelming you. When you want to quiet your mind even further, Week Focus Mode hides everything beyond the next seven days, with a soft "Want to peek ahead?" option to reveal future plans on your own terms. Life slips, and NeuroCal expects it. Miss something? There's no red-alert shame — just a gentle highlight and a one-tap way to push it to later, tomorrow, or next week. Bigger tasks can hold their own small steps, so something like "taxes" doesn't sit there as one intimidating block. And optional, kindly-worded check-ins help you circle back — never nagging, never guilt. The design is intentionally ADHD-friendly: soft animations, calm colors, subtle haptics, and a comfortable, non-stimulating feel throughout. Completed items fade away so you get closure without clutter. Choose the look that suits you, and let the interface stay grounded and quiet. NeuroCal is built for real minds — nonlinear thoughts, bursts of energy, forgotten tasks, random ideas, and last-minute changes. Instead of forcing structure, it adapts to how you actually think. Capture anything: tasks, plans, events, errands, reminders, stray thoughts, even full paragraphs. NeuroCal makes sense of each one and organizes it automatically, so everything you need lives in one simple, supportive space. Every part of the app is designed with intention: low friction, low anxiety, low clutter, all in service of clarity and calm. It's a tool that helps you feel lighter the moment you open it — a place where your thoughts become easier to manage and your week feels more doable.

About

String Theory!

Features
Read full description

String Theory is a visual detective board app that helps you organize ideas, clues, and connections in one place. Create interactive boards where you can add Polaroid-style photos, notes, tags, and images, pin them freely, and connect everything with strings to reveal patterns and relationships. Perfect for detectives, writers, students, researchers, and creative thinkers, String Theory turns complex information into a clear visual map. Whether you’re solving a mystery, planning a story, organizing research, or brainstorming ideas, your board evolves as your thoughts connect. Features: - Create unlimited detective boards - Add Polaroid photos, images, and notes - Pin items anywhere on the board - Connect clues using realistic strings - Use tags to organize and group ideas - Clean, intuitive, and distraction-free design Organize your thoughts visually. See the connections. Follow the strings. Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

NeuroCal4 screens
String Theory!3 screens

Verdict

The call

The clearest difference is ads: NeuroCal at none against String Theory!'s shown. String Theory!'s advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.6). On price and in-app purchases 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. NeuroCal sells 3 one-off in-app purchases and String Theory! sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard3 real differences · 6 level
NeuroCal versus String Theory!: the parameters behind the verdict, then further details
ParameterNeuroCalString Theory!
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 8 months—
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.615.1 — better
Further details — not scored
Size22 MB56 MB
Age rating4+4+
DeveloperDaniel RomeroSynthify Inc

In-app purchases

3 purchases

NeuroCal

One-time3
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$4.99
3 purchases

String Theory!

Subscriptions2
  • Weekly$2.997 Days
  • Yearly$24.991 Year
One-time1
  • One Time$29.99

Questions

Is NeuroCal free?
NeuroCal is free to download, with in-app purchases available.
Is String Theory! free?
String Theory! is free to download, with in-app purchases available.
Do NeuroCal or String Theory! have ads?
String Theory! shows ads; NeuroCal does not.

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