Comparison

Prod. Calc. for 1404 Lite vs Keystone

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

Head to head
About

Prod. Calc. for 1404 Lite

This app helps players optimize their city-building games by calculating the exact number and type of production buildings needed to support a given population. It visualizes production chains and building utilization, turning complex resource management into a simple, two-step process.

Highlights
  • Population input (inhabitants or houses)
  • Results sorted by product
  • Building utilization display
  • Production chain visualization
  • Support for multiple building types per product
Features
Read full description

Production Calculator 1404 can help you to play like a Pro! It helps you to improve your supply skills showing you exactly how many buildings of which type you need to support your population perfectly. By the time you will get a feeling for this too and you will become a better player! You can also view the production chains. They show the relations between the buildings, so no goods will be produced useless anymore. Features: - Enter your Population (inhabitant or houses) - You get the results, sorted by product - Add a checkmark to buildings you already have - Choose from different buildings, which produce the same There are 2 simple steps: (1) Enter your population (also houses are possible) (2) Tap on "Calculate" And you will get instantly the results: โ€ข How many buildings of which type you need โ€ข The utilization of the buildings

About

Keystone

Features
Read full description

Keystone is a calm home for your projects and the work inside them. Plan the week on your iPhone, and when a task is code, hand it to the coding agent on your Mac and review what it did from wherever you are. EVERY PROJECT IN ONE LIST Scan your active projects at a glance, each marked by its priority. Tap a project to see its open tasks, fold completed work away, and archive the project when it's done. HAND TASKS TO YOUR CODING AGENT Connect a project to Claude Code, Codex or another coding agent with one copied setup prompt. Open a task and turn on Send to Claude Code: the Keystone Listener on your Mac picks it up and runs the agent in your own repository, with your own account. Keystone shows each task's progress (Shared, Working, Ready to review) and tells you when the agent needs permission. REVIEW BEFORE ANYTHING SHIPS When the agent finishes, read its summary, the checks it ran and the branch it used. Review & push lists every changed file and the unpushed commits; open any file for a line-by-line diff. Nothing is committed until you approve it. Keystone then commits to a new branch, pushes it and opens a pull request. Only you mark a task complete. PLAN THE WEEK Week opens on today. Plan projects for each day, schedule tasks, and see what's coming. Swipe up on the tabs to see everything that needs you. A Home Screen widget keeps today's tasks nearby. CAPTURE WORK QUICKLY Type into the command bar to add a task: @project picks the project (or creates it), ?today, ?tomorrow or ?mon schedules it, and !high sets the priority. Copy open tasks or share them as a Markdown file. YOUR DATA STAYS YOURS Your projects sync through your private iCloud. Export a full backup or save one to iCloud from Settings. Coding-agent features are optional: only the tasks you choose to send leave your iPhone, and your code never leaves your Mac. No ads, no tracking. Built for iPhone. The coding-agent features need a Mac with Claude Code or Codex installed and the free Keystone Listener.

Screenshots

Prod. Calc. for 1404 Lite3 screens
Keystone4 screens

Verdict

The call

The clearest difference is update cadence: Keystone at fortnightly against Prod. Calc. for 1404 Lite's every 10 months. Prod. Calc. for 1404 Lite's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Prod. Calc. for 1404 Lite ships an update every 10 months, Keystone fortnightly. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

Scorecard3 real differences ยท 5 level
Prod. Calc. for 1404 Lite versus Keystone: the parameters behind the verdict, then further details
ParameterProd. Calc. for 1404 LiteKeystone
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 10 monthsFortnightly โ€” better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS12.0 โ€” better17.0
Further details โ€” not scored
Size9 MB6 MB
Age rating4+4+
DeveloperMax HaertwigIonut Mocanu

In-app purchases

None

Prod. Calc. for 1404 Lite

No in-app purchases

None

Keystone

No in-app purchases

Questions

Is Prod. Calc. for 1404 Lite free?
Prod. Calc. for 1404 Lite is free to download, with no in-app purchases.
Is Keystone free?
Keystone is free to download, with no in-app purchases.
Do Prod. Calc. for 1404 Lite or Keystone have ads?
Neither Prod. Calc. for 1404 Lite nor Keystone shows ads.
Which is updated more often, Prod. Calc. for 1404 Lite or Keystone?
Prod. Calc. for 1404 Lite ships an update every 10 months, and Keystone fortnightly. Most recently, Prod. Calc. for 1404 Lite was updated on October 6, 2026 and Keystone on October 24, 2026.

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