PJFFfree vs 4M Plan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PJFFfree
This app serves as a manual for piping parts, focusing on Japanese specifications. It lists commonly used items based on manufacturer data and public dimension tables, with all measurements in millimeters.
- Piping parts manual
- Japanese specifications
- Commonly used parts listing
- Manufacturer data integration
- Millimeter measurements
- JIS standards compliance
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It is a manual of piping parts. Only Japanese specification. We are listed at the discretion of the things that seems to be in common use based on manufacturer's data and the dimension tables of dealers that are open to the public. Length units are in millimeters unless otherwise specified in decimal notation JIS standards compliance
4M Plan
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4M Plan is a digital platform that helps you plan, track, and manage tasks
Screenshots
Verdict
The clearest difference is ads: 4M Plan at none against PJFFfree's shown. 4M Plan also leads on update cadence (every 9 days vs every 5 weeks). PJFFfree's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support 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.
PJFFfree ships an update every 5 weeks, 4M Plan every 9 days. The most recent releases landed on September 22, 2026 and September 15, 2026 respectively.
| Parameter | PJFFfree | 4M Plan |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 weeks | Every 9 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | sigeyosi kanenishi | Cutech Infocomm Solutions Ptd Ltd |
In-app purchases
PJFFfree
No in-app purchases
4M Plan
No in-app purchases
