Comparison

iPool vs Ruler

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iPool

Features
Read full description

Мобильное приложение, дающее возможность Вам, Вашей семье и обслуживающей организации контролировать состояние бассейна, управлять всеми технологическими процессами системы водоподготовки, а также аттракционами и освещением. Приложение обладает функцией кастомизации, адаптируясь именно под Ваш бассейн. Оно отражает работу только актуального оборудования, установленного в Вашем бассейне. Мобильное приложение позволяет Вам управлять неограниченным количеством бассейнов и подключать к приложению любое число пользователей, причем с возможностью делегирования прав доступа к определенному оборудованию бассейна.

About

Ruler

This app transforms your phone into a precise measuring tool. Calibrate it once with a common object to accurately measure small items, angles, and levels. It also includes a unit converter and a tape canvas for larger measurements.

Highlights
  • Calibrated on-screen ruler
  • Protractor with set square
  • Bubble level
  • Unit converter
  • Tape canvas for length and area
  • Saved history for measurements
Features
Read full description

Need to measure something right now and there is no tape measure in sight? RulerTape turns your iPhone screen into a calibrated ruler. Lay a screw, coin, cable, key or charm on the display, drag the two guides to its edges, and read the size in centimeters, millimeters or inches. Most screen rulers guess your device size and hand you a number that is quietly wrong. RulerTape has you calibrate once against a bank card or coin you already own, stores that factor, and applies it to every tool in the app. And it does not stop at a ruler: a drag-anywhere tape canvas, a protractor with a rotating set square, a bubble level driven by the motion sensors, and a length converter all read from the same calibration. Everything runs offline on the device — no camera, no account, no connection. WHAT YOU GET - Read the exact size of small parts in cm, mm or inches without hunting for a tape measure - Trust the number, because you calibrated the scale against a real card once - Measure length, area, height and tilt on one drag canvas, then lock the reading so it cannot slip - Check any angle with the protractor and set square, or square up a shelf with the bubble level - Convert mm, cm, m, km, inches, feet, yards and miles without leaving the app - Keep useful sizes in history, star the ones you reuse, and pull them back up later PERFECT FOR - DIY and home repair: screws, bolts, washers, drill bits, hardware you have to match - Crafters, jewelers and hobbyists sizing beads, findings, yarn, model parts - Shoppers checking whether a listed dimension really fits the shelf or the wrist - Students and makers who need an angle, a level line or a fast unit conversion WHY NOT JUST USE A REAL TAPE MEASURE Because yours is in the other room and the thing in your hand is 18 mm wide. A screen ruler wins on small objects you can physically rest on the glass, and it is always in your pocket. For anything longer than the display, the tape canvas and the converter carry the job. We will say it plainly: readings are calibrated approximations built for fast everyday sizing, not for machining tolerances. PRIVACY Measurements, favorites and your calibration factor stay in the app on your device. No account, no sign-up, no tracking profile, no ads. It all works with airplane mode on. FULL ACCESS Full access unlocks every tool with no limits: the calibrated on-screen ruler, the tape canvas with length, area and height modes, the protractor and set square, the bubble level, the unit converter, the common-object size reference and saved history. Offered as a weekly subscription, a yearly subscription, or a one-time lifetime purchase. Subscriptions renew automatically until cancelled in your Apple Account settings; the lifetime option is paid once. Calibrate against a card in under a minute, then measure the next small thing you pick up. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com

Screenshots

iPool4 screens
Ruler4 screens

Verdict

The call

The clearest difference is in-app purchases: iPool at none against Ruler's 3. iPool also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ruler sells 3 in-app purchases, starting at $4.99 per 7 days. iPool asks for nothing beyond the download.

UpkeepUpdate frequency

iPool ships an update every 4 weeks, Ruler every 6 weeks. The most recent releases landed on October 18, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 5 level
iPool versus Ruler: the parameters behind the verdict, then further details
ParameteriPoolRuler
PriceFreeFree
Positive reviews—0.0% of reviews
Update frequencyEvery 4 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size26 MB10 MB
Age rating4+4+
DeveloperPuzzle EngineeringPhuc Pham

In-app purchases

None

iPool

No in-app purchases

3 purchases

Ruler

Subscriptions2
  • Angle & Protractor Weekly$4.997 Days
  • Unit Converter Yearly$24.991 Year
One-time1
  • Bubble Level Kit, Pay Once$49.99

Questions

Is iPool free?
iPool is free to download, with no in-app purchases.
Is Ruler free?
Ruler is free to download, with in-app purchases available.
Do iPool or Ruler have ads?
Neither iPool nor Ruler shows ads.
Which is updated more often, iPool or Ruler?
iPool ships an update every 4 weeks, and Ruler every 6 weeks. Most recently, iPool was updated on October 18, 2026 and Ruler on October 20, 2026.

Other comparisons