TagTap vs Edge Ruler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TagTap
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Know what’s on a tag. Write the right data. Verify that it works. TapForge is the offline NFC reader and writer for iPhone — built for small businesses, creators, and anyone who programs tags without wanting an engineering manual. READ ANY COMPATIBLE TAG Hold your iPhone near a tag and see a clear summary of every record — plus technical details when you need them. Nothing opens until you choose to. URLs show the full hostname so you know where a tag really points. WRITE WITH CONFIDENCE Compose URL, text, contact, phone, email, SMS, Wi‑Fi, and location records. See the exact encoded size before you write. If a tag is too small, locked, or incompatible, TapForge stops you before anything goes wrong. VERIFY EVERY WRITE After each write, TapForge reads the tag back and confirms a match. Success means verified — not “probably written.” MAKE EVERY TAP USEFUL Create Google review cards, Instagram profile tags, customer feedback cards, digital menus, booking links, Wi‑Fi stickers, and event check-in tags. Add your link, write it to a compatible NFC tag, and let customers tap to open it. SAVE ONCE. WRITE AGAIN. Save your favorite setups as templates and reuse them whenever you need. With TapForge Pro, use batch write mode to program multiple tags with the same business link. BUILT FOR REAL TAGS Works with common NFC Forum tags (including NTAG213 / 215 / 216). Erase, copy NDEF content, and inspect capacity and writability. PRIVACY FIRST No account. No cloud required. Your templates stay on your device. Basic reading is never locked behind a paywall. FREE INCLUDES • Read NFC / NDEF tags • Write core record types (URL, text, contact, phone, email, SMS, Wi‑Fi, location) • Erase and verify • Limited saved templates TAPFORGE PRO (ONE-TIME UNLOCK) • Unlimited templates & groups • QR import / export for transferable records • Batch write mode • Custom MIME / external records • Advanced diagnostics • Template encryption TapForge Pro is a one-time purchase — no subscription. Compatible with iPhone 7 and later with NFC. Some features depend on the tag and iOS Core NFC support.
Edge Ruler
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Edge Ruler turns iPhone and iPad into a ruler that measures from the device corner. Hold the corner against an object, read length and width. No camera trick, no guessing: the app knows, for every device, the distance from the housing edge to the first pixel and draws the scale to the millimeter. Two corner rulers in opposite corners, two measuring lines with handles that lock when released, values in cm, inches with fractions or 寸. With Calibrate you place a bank card or coin on a real-size template and see at once whether everything lines up; bezel values can be adjusted in tenths of a millimeter. Five school worlds as outfits: grid paper and clear ruler like a German pencil case, yellow wooden ruler on wide-ruled paper like in the US, 田字格 with a tinted student ruler like in China, Seyès notebook with a “double décimètre” like in France, “cuadrícula” with a “regla” like in Spain. Paper, ruler, line color and unit combine freely. The basic ruler is free. Everything else can be tried for 14 days and then unlocked once: your region's outfit with second scale, rotating numbers, all four zero corners, movable zero, measurement table and inclinometer, or all five school worlds at once. Accurate to about 0.3 mm on calibrated models; not a certified measuring instrument. No data collected, no account, no internet.
Screenshots
Verdict
TagTap and Edge Ruler are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. TagTap sells 1 one-off in-app purchase and Edge Ruler sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
| Parameter | TagTap | Edge Ruler |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Lucie Valentova | Theater der Zeit |
In-app purchases
TagTap
- TagTap Pro$2.99
Edge Ruler
- 14-day TrialFree
- Regional Outfit$1.99
- All Outfits$1.99









