Compressor vs AmpGuide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Compressor
Easily reduce the file size of your images to save storage space and improve sharing speeds. This utility allows you to compress single or multiple photos directly from your library or files, working offline for privacy.
- Reduce image file size
- Compress from library or files
- Select multiple photos
- Fast and simple operation
- Offline and private compression
- Integrates with Shortcuts app
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Free up space and speed up sharing with Compressor, the easiest way to compress images directly from your photo library. No ads, no complexity: just fast and effective image compression. - Reduce Image File Size - Compress from your library or your files - Select one or many photos - Fast & Simple - Offline & Private - Available in Shortcut app Perfect for anyone looking to send images faster, upload quicker, or free up storage.
AmpGuide
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AmpGuide is an electrical field reference and calculator suite for electricians, apprentices, inspectors, engineers, solar installers, EV installers, and serious DIY customers. It brings common jobsite calculations into one offline workbench so you can check numbers, compare options, and keep notes without digging through separate utilities. Version 2.5 includes 27 calculators plus Inspection Brief for saved Jobs. The app reviews the calculations in a job pack, assigns a readiness score, flags failing results, calls out missing core checks, and suggests the next actions to document before review. Core tools include: - Wire size calculator with ampacity and voltage-drop checks. - Voltage drop for copper or aluminum, single-phase or three-phase. - Ampacity tables with ambient and conductor-count derating. - Breaker sizing for continuous and non-continuous loads. - Conduit fill, box fill, Ohm's Law, and three-phase helpers. - Standard and optional method service-load calculations. - Transformer kVA sizing and NEC 450.3(B)-style OCPD guidance. - Wire pull tension and jam-ratio checks. - Grounding electrode and equipment grounding conductor sizing. - Motor FLC, lighting demand, range demand, dryer demand, and fault-current tools. - Solar PV string, EV charger, parallel conductor, burial depth, and bid-estimate workspaces. - Conduit bender and wire color, resistor, thermocouple, and plug-pinout references. AmpGuide is designed for quick field decisions and reviewable planning. It is an informational reference and calculator, not a substitute for the official NEC, engineering judgment, jobsite conditions, permits, inspections, or authority-having-jurisdiction requirements. Always verify final work against currently adopted code and local requirements. Saved calculations and job notes stay on the device. AmpGuide does not request protected device permissions.
Screenshots
Verdict
The clearest difference is price: Compressor at Free against AmpGuide's $2.99. Compressor also leads on update cadence (every 4 days vs weekly). On ads, in-app purchases, device support and iOS requirement 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
Compressor is free to download; AmpGuide costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Compressor ships an update every 4 days, AmpGuide weekly. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.
| Parameter | Compressor | AmpGuide |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Pierre Abi-aad | Robert Corbin |
In-app purchases
Compressor
No in-app purchases
AmpGuide
No in-app purchases









