Resistor vs My C.E.M.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Resistor
Quickly calculate resistor values from color bands or SMD codes, and vice versa. This tool is ideal for electronics enthusiasts, students, and DIYers working with 4, 5, or 6-band resistors and various SMD codes. It functions offline and requires no registration.
- Calculate resistor values from color bands
- Convert resistor values to color bands
- Supports 4, 5, and 6-band resistors
- Handles SMD codes (EIA-3, EIA-4, EIA-96)
- Works offline
- No registration required
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Resistor Converter – Fast & Easy Calculate resistor values, color bands, and SMD codes in seconds – perfect for electronics hobbyists, students, and professionals. Supports 4-, 5-, and 6-band resistors as well as SMD codes (EIA-3, EIA-4, EIA-96). - Tap color bands → read the value - Enter resistor → get matching color bands & SMD codes - Works offline, no registration required - Perfect for electronics, study & DIY projects Simple, fast, and free – the perfect companion for every electronics enthusiast!
My C.E.M.
Monitor your real-time energy consumption and track your bills. Control connected power units and gain insights into your energy usage patterns and trends.
- Real-time energy consumption monitoring
- Track paid and unpaid bills
- Control connected power units
- Access energy insights and trends
- Monitor energy behavior
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CEM is a real time mobile application which enables you to monitor energy consumption, track your paid and unpaid bills, control the power of the connected unit(s), and have access to many energy insights and trends regarding your energy behavior.
Screenshots
Verdict
The clearest difference is update cadence: My C.E.M. at fortnightly against Resistor's every 9 months. My C.E.M. also leads on iOS requirement (13.0 vs 26.0). Resistor's advantage is ratings volume (19 vs 1). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 4.9 for Resistor against 5.0 for My C.E.M.. That said, the two scores are not equally well evidenced: Resistor has 19 ratings behind it against 1, so its average is the more settled of the two.
Resistor ships an update every 9 months, My C.E.M. fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Resistor | My C.E.M. |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (19 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 9 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 102 MB |
| Age rating | 4+ | 4+ |
| Developer | Gerhard Lentschik | Farid Deaibess |
Customer experience
Resistor
My C.E.M.
In-app purchases
Resistor
No in-app purchases
My C.E.M.
No in-app purchases
