Comparison

Map Calipers vs REmu

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

Head to head
About

Map Calipers

This mapping toolkit helps you pinpoint locations within defined boundaries using interactive tools. It leverages transit data to overlay routes and stops, aiding in tracking targets. Optional GTFS data integration provides precise transit line information.

Highlights
  • Location pinpointing within boundaries
  • Interactive 'Radar' and 'Thermometer' tools
  • GTFS transit data overlay
  • Route and stop analysis
  • Dynamic mapping tools
  • Self-hosting GTFS data option
Features
Read full description

MapCalipers is a flexible mapping toolkit (built primarily to help you defeat your friends in "Jet Lag: The Game", a Hide and Seek Transit Game!) The iOS app helps you pinpoint your target’s location within defined boundaries, steadily shrinking the search area using interactive tools like “Radar” and “Thermometer”. Leveraging standard GTFS data, the app overlays precise transit lines and stops onto your play area. Use the built-in analysis features to determine which routes and stops your target might be hiding at, then use the dynamic mapping tools to track them down! Using GTFS transit data is optional. Note that GTFS data may not be available for all cities and requires prior server-side setup. See the linked blog post at https://joshspicer.com/mapcalipers#self-hosting for more info and for self-hosting instructions. ** Please email me your city's GTFS info if you'd like me to put it on the default sync server for all to enjoy! ** This app is not affiliated with "Jet Lag: The Game Hide and Seek Transit Game" on Nebula.tv and YouTube.

About

REmu

This app allows you to import and play your own classic game ROMs on your device. It features a clean library, automatic system detection, and customizable controls, including gamepad support. Enjoy your retro gaming collection with smooth rendering and save states.

Highlights
  • Import your own ROMs
  • Organized game library
  • Metal-accelerated rendering
  • On-screen touch controls
  • MFi gamepad support
  • Save states
  • Built-in mini-game
Features
Read full description

REmu is a clean, focused retro library for files you already own. Import your own ROMs from the Files app, organize them in a tidy library, and play them with smooth Metal-accelerated rendering, on-screen touch controls, or any MFi-compatible gamepad. Built for landscape, designed to feel modern. WHAT'S INSIDE • A polished library that auto-detects the system from each file you import • Cover art pulled from the file when available, or matched against an open-source thumbnail database • Save states from the in-game menu — pause, save, resume any time • One built-in original mini-game (Glowchase) so the app is fun out of the box • Full MFi controller support including DualSense and Xbox Wireless WHAT'S NOT INSIDE • No game files. REmu does not ship, distribute, or download commercial games. • No BIOS files. Provide your own where required. • No ads, no in-app purchases, no tracking, no accounts. YOUR RESPONSIBILITY By using REmu, you confirm that any file you import is one you legally own (typically dumped from your own cartridge or disc) or one that is freely licensed (homebrew, public domain, etc.). Piracy is not supported in any form. PRIVACY REmu stores everything on your device. Nothing is uploaded. See the in-app Terms and Privacy Policy for full details. REmu is an independent project and is not affiliated with, endorsed by, or sponsored by any console manufacturer. All trademarks are the property of their respective owners.

Screenshots

Map Calipers4 screens
REmu4 screens

Verdict

The call

The clearest difference is rating: Map Calipers at 5.0 against REmu's 4.2. Map Calipers also leads on ads (none vs shown). REmu's advantage is update cadence (every 5 days vs monthly) and iOS requirement (15.0 vs 18.0). On price, ratings volume, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Map Calipers holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

UpkeepUpdate frequency

Map Calipers ships an update monthly, REmu every 5 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 5 level
Map Calipers versus REmu: the parameters behind the verdict, then further details
ParameterMap CalipersREmu
PriceFreeFree
Rating5.0 (2 ratings) — better4.2 (5 ratings)
Number of ratings25 — better
Update frequencyMonthlyEvery 5 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size12 MB41 MB
Age rating4+9+
DeveloperJoshua SpicerFATIH KOCA

In-app purchases

None

Map Calipers

No in-app purchases

None

REmu

No in-app purchases

Questions

Is Map Calipers free?
Map Calipers is free to download, with no in-app purchases.
Is REmu free?
REmu is free to download, with no in-app purchases.
Which has better reviews, Map Calipers or REmu?
Map Calipers is rated higher. Map Calipers averages 5.0 out of 5 from 2 ratings, while REmu averages 4.2 from 5 ratings.
Do Map Calipers or REmu have ads?
REmu shows ads; Map Calipers does not.
Which is updated more often, Map Calipers or REmu?
Map Calipers ships an update monthly, and REmu every 5 days. Most recently, Map Calipers was updated on October 22, 2026 and REmu on October 24, 2026.

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