BM6 vs Keepfold
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BM6
Monitor your car's battery in real-time via Bluetooth. This app tests starting and charging systems, records engine start/stop times, and displays all data on your mobile device for easy management of your vehicle's battery power.
- Real-time battery voltage monitoring
- Starting system voltage test
- Charging system voltage test
- Records engine start/stop times
- Bluetooth data display
- Vehicle battery power management
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Battery monitor 6 is an application of automobile battery. It can let people know the voltage of automobile battery in real time. It helps users fully understand the battery by testing the starting and charging system voltage. It can accurately record the time of car starting and stopping. All data can be displayed on the mobile phone through Bluetooth. Easy management of vehicle battery power
Keepfold
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Keepfold holds the small details you keep looking up: the registration number, the Wi-Fi password at the cabin, the hotel room, the booking reference. One card each, kept exactly as you typed it — leading zeros, spaces and capitals untouched — and one tap to copy. Give a card a last day and it tidies itself away when that day has passed. It moves to the archive, not the bin, and one tap brings it back. SEVEN DAYS WITH EVERYTHING Your first card starts a week of the whole app. After that, Keepfold Plus keeps it all — a yearly plan, or a single purchase. Prices are listed under In-App Purchases above. Exporting every card as a plain text file is free, always: before, during and after. WIDGETS Choose which cards may appear on your Home Screen or Lock Screen. Nothing is shown there unless you say so. LOCKED CARDS Lock a card and it shows dots until you confirm with Face ID, Touch ID or your passcode. A shield against a glance — not a safe. Keepfold is not a password manager and does not pretend to be. ICLOUD, IF YOU WANT IT Off by default. Turn it on and your cards are kept in your own iCloud as an encrypted field, so your iPad shows the same list. We have neither an account nor a server. HONEST BY DESIGN No data collection, no tracking, no ads. Your cards stay on your device unless you choose otherwise. Deleted cards are kept for 30 days, then gone for good. Made in Sweden. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://nilssonkristoffe.github.io/keepfold-site/privacy/
Screenshots
Verdict
The clearest difference is in-app purchases: BM6 at none against Keepfold's 2. BM6 also leads on iOS requirement (15.6 vs 18.0). Keepfold's advantage is update cadence (daily vs every 5 weeks). On price, ads 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. Keepfold sells 2 in-app purchases, starting at $7.99 per year. BM6 asks for nothing beyond the download.
BM6 ships an update every 5 weeks, Keepfold daily. Both last shipped on September 22, 2026.
| Parameter | BM6 | Keepfold |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (17 ratings) — better | — |
| Positive reviews | 45.8% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 5 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 64 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Leagend Optoelectronics Co., Ltd. | AKE KRISTOFFER NILSSON |
In-app purchases
BM6
No in-app purchases
Keepfold
- Keepfold Plus$7.991 Year
- Keepfold Plus Lifetime$14.99









