Map Calipers vs REmu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Import your own ROMs
- Organized game library
- Metal-accelerated rendering
- On-screen touch controls
- MFi gamepad support
- Save states
- Built-in mini-game
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
Map Calipers ships an update monthly, REmu every 5 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | Map Calipers | REmu |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.2 (5 ratings) |
| Number of ratings | 2 | 5 — better |
| Update frequency | Monthly | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 41 MB |
| Age rating | 4+ | 9+ |
| Developer | Joshua Spicer | FATIH KOCA |
In-app purchases
Map Calipers
No in-app purchases
REmu
No in-app purchases









