Circuit Colors vs FieldStack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Circuit Colors
Quickly determine the phase color for any circuit number across various international electrical systems. This app simplifies electrical work by eliminating the need for manual calculations or reference sheets.
- Determine phase color by circuit number
- Supports US, Canada, EU, and UK systems
- Add unlimited electrical panels
- Configurable single or three-phase
- Customizable phase color combinations
- Multiple circuit numbering styles
- Supports 4 to 1000 circuits
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Know the phase color. Instantly. Circuit Colors takes the guesswork out of determining phase colors for any circuit number. No cheat sheets. No mental calculations. No searching through tables. Just enter your panel configuration and circuit number, and Circuit Colors gives you the correct phase color instantly. Built for electricians. Built for real-world panels. • Supports US, Canada, EU & UK systems • Single-phase and three-phase panels • Add as many panels as you need • Choose from multiple phase-color combinations • Supports circuit numbering from 4 to 1,000 • Single-sided and double-sided panel layouts • Multiple numbering styles, including conventional zig-zag numbering Whether you're troubleshooting, installing, labeling, or working in an unfamiliar panel, Circuit Colors puts the answer right at your fingertips. Stop carrying the cheat sheet. Stop doing the math. Just enter the circuit number and get the color.
FieldStack
This app provides an offline workspace for construction plans, allowing users to import PDFs, search every page for specific information, and create custom boards of relevant sheets. It enables on-page markup, field status recording, and note-taking, all accessible without an internet connection.
- Offline PDF plan import
- Full-page search
- Customizable sheet boards
- On-page markup tools
- Field status tracking
- Notebooks for notes and photos
- Siri and widget integration
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FieldStack is an offline field workspace for construction plan PDFs. Import the drawings without changing the original files, search every page for a room or sheet in seconds, and build a board of just the sheets a task needs. It is built for job sites with bad or no internet. SEARCH EVERY PAGE Type a room number, sheet title, or any word. FieldStack searches every page of every plan and opens the page right at the match. BUILD THE BOARD Pull the sheets a task needs into one board and arrange them your way. Press and hold a sheet to move it, set the columns, or remove sheets. The full PDF stays readable. MARK UP IN LAYERS Draw on any page in named layers like As-built, Coordination, or Punch list. Show one, some, or all, and draw on one while the rest stay in view. Markup shows on every board with that page. TRACK STATUS ON THE PLAN Place marks on a board and set them Open, In Progress, Blocked, or Done, with Urgent on top. Filter to what still needs you and keep every mark and note in one list. NOTEBOOKS Place plan pages, photos, shapes, and symbols side by side, and connect them. SIRI, SEARCH, AND WIDGETS Ask Siri to search FieldStack, find sheets from Home Screen search, and open a board, a plan set, or search from a widget. BRING THE PLANS Import source PDFs without changing the originals in Files. FieldStack does not require an account, a team workspace, or a subscription. Optional tips support continued development and unlock nothing. The reviewed interface supports English, French, Spanish, and Brazilian Portuguese. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://unshackledpursuit.com/fieldstack#privacy
Screenshots
Verdict
The clearest difference is price: FieldStack at Free against Circuit Colors's $1.99. FieldStack also leads on rating (5.0 vs 3.7) and review sentiment (100% vs 58%). Circuit Colors's advantage is ratings volume (25 vs 1) and chart position (#38 vs unranked). On ads, 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
FieldStack is free to download; Circuit Colors costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FieldStack holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Circuit Colors has 25 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 58% of Circuit Colors's written reviews are positive against 100% of FieldStack's.
Circuit Colors ships an update every 9 months, FieldStack every 8 days. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.
| Parameter | Circuit Colors | FieldStack |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.7 (25 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 58.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 25 — better | 1 |
| Update frequency | Every 9 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #38 — better | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 2 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Francisco Alcala | Dylan Russell |
Customer experience
Circuit Colors
FieldStack
In-app purchases
Circuit Colors
No in-app purchases
FieldStack
No in-app purchases
Questions
Is Circuit Colors free?
Is FieldStack free?
Which has better reviews, Circuit Colors or FieldStack?
Do Circuit Colors or FieldStack have ads?
Which is updated more often, Circuit Colors or FieldStack?
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