STEELMAN vs NRG Optimizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STEELMAN
This app transforms your iOS device into a sound and vibration detection tool. It helps pinpoint defective or worn parts in vehicles and machinery by analyzing rattles, squeaks, and grinding sounds. Requires additional hardware for full functionality.
- Sound and vibration detection
- Pinpoints defective parts
- User-friendly interface
- Analog and digital readings
- Selectable audio/vibration input
- 10-band frequency equalizer
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Developed for the service technician in mind the STEELMAN SmartEAR1 Sound & Vibration Detection app will assist in locating and pinpointing defective or worn parts in automobiles, heavy machinery or industrial equipment. When used to diagnose vibration, rattles, squeaks and grinding sounds the SmartEAR1 will simplify the task of locating and pinpointing the troubled area or part with ease. When used with our specially designed hardware kits your iOS device will be able to transform into a state of the art Sound & Vibration Detection Tool allowing for ease of locating and pinpointing those hard to find troubled areas or parts. ****NOTE: Additional hardware is required to use this app. For additional information on where to purchase this hardware, please visit https://www.jsproductsinc.com Features: User friendly interface and intuitive operation. Sound level reading displays average, peak and real-time values. Sound level readings are displayed in either Analog or Digital. Analog and Digital readings have 2 display panels the user can choose from. Analog Meter or Analog Wave-Form. Digital Numeric or Digital Bar Graph. Background sound off-setting, sample rates, decibel off-setting can be manually be set. Selectable Audio Sound or Vibration input modes. ****Sound Wand & Sensor Clamp Hardware required**** Reset/Refresh buttons reset/refresh values to default settings. Sound Level Reading Sampling Rate Decibel Off-set Master Volume Control 10 Band Frequency Equalizer allows for HQ sound detection. User information guide includes informative facts about sound perception and permissible noise level exposure as well as a sound level comparison reference chart. Additional Information: Required: Any iOS device running iOS5.0+. Recommended: iPhone 4 and newer/ iPod Touch 4 and newer. Compatible: iPad 2 and newer.
NRG Optimizer
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NRG Optimizer is a commercial application designed for Operations professionals looking to improve energy savings through smart control of smart devices like LED lighting, occupancy sensors, daylight sensors, electrical outlets and lighting controls.
Screenshots
Verdict
The clearest difference is iOS requirement: STEELMAN at 9.0 against NRG Optimizer's 12.0. On price, update cadence, 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.
STEELMAN ships an update every 22 months, NRG Optimizer every 13 months. The most recent releases landed on October 12, 2026 and September 29, 2026 respectively.
| Parameter | STEELMAN | NRG Optimizer |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 22 months | Every 13 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 19 MB | 154 MB |
| Age rating | 4+ | 4+ |
| Developer | JS Products, Inc. | T.G.L. Inc. |
In-app purchases
STEELMAN
No in-app purchases
NRG Optimizer
No in-app purchases
Questions
Is STEELMAN free?
Is NRG Optimizer free?
Do STEELMAN or NRG Optimizer have ads?
Which is updated more often, STEELMAN or NRG Optimizer?
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