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Measured, not promised.

MOPX 2.8.0 timed on real Android phones in Google’s Firebase Test Lab, in shops of up to 300,000 bills.

Start with the phones

Firebase Test Lab · 17 Oct 2026 37/37

0.17s

to save a 100-item bill on a budget realme C53, with 300,000 bills in the shop
  • realme C53 171 ms
  • OnePlus Nord CE 3 Lite 111 ms
  • Samsung Galaxy S25 48 ms
Data checks agreed
37/37
Real phones
8
Biggest shop
744 MB

[01]The phones

Budget, mid-range, flagship.

Test Lab has no Redmi, Poco or vivo phones, so the everyday pair is a realme C-series and a OnePlus Nord.

  • Budget

    realme C53

    2023 · Android 15

    Chip
    Unisoc T612
    CPU
    2× A75 + 6× A55, 1.82 GHz
    Memory
    5.6 GB
    Storage
    eMMC
    Screen
    720×1600, 60 Hz

    JS speed 24

  • Mid-range

    OnePlus Nord CE 3 Lite

    2023 · Android 14

    Chip
    Snapdragon 695
    CPU
    2× A78 2.21 GHz + 6× A55 1.8 GHz
    Memory
    7.2 GB
    Storage
    UFS
    Screen
    1080×2400, 90 Hz

    JS speed 47

  • Flagship

    Samsung Galaxy S25

    2025 · Android 16

    Chip
    Snapdragon 8 Elite
    CPU
    2× Oryon 4.47 GHz + 6× 3.53 GHz
    Memory
    10.9 GB
    Storage
    UFS
    Screen
    1080×2340, Adaptive

    JS speed 100

The same JavaScript work on each phone, fastest = 100.

[02]The shops

Up to a decade of bills.

Every phone ran three made-up shops shaped like real ones: popular products sell more, one bill in five names a regular customer, a few are on credit.

  1. 01 small

    10,125 bills

    products
    1,023
    bill lines
    33,259
    database
    25 MB

    About a year of a shop making 30 bills a day.

  2. 02 medium

    100,248 bills

    products
    10,030
    bill lines
    306,502
    database
    242 MB

    Over a year of a busy shop, 200 bills a day.

  3. 03 large

    300,371 bills

    products
    50,037
    bill lines
    909,745
    database
    744 MB

    A busy shop’s decade.

[03]At the counter

New bill to printed receipt, in seconds.

Real taps through the screens in a 10,000-bill shop, timed from the tap to the result.

One sale, tap by tapTotal

realme C53 3.1 s

1 2 3 4 5 6 7

OnePlus Nord CE 3 Lite 3.6 s

1 2 3 4 5 6 7

Samsung Galaxy S25 1.1 s

1 2 3 4 5 6 7
  1. Start a new bill
  2. Open product search
  3. Search a product by name
  4. Back to the bill
  5. Go to payment
  6. Complete the bill
  7. Print the receipt
Every step at the counter
  • C53
  • Nord
  • S25
  • Open the stock list 478 633 98
  • Save a new product 254 191 50
  • Start a new bill 418 268 104
  • Open product search 245 475 74
  • Search a product by name 135 864 69
  • Back to the bill 699 740 165
  • Go to payment 333 418 112
  • Complete the bill 855 566 390
  • Print the receipt 391 308 181
  • Share as PDF 1003 859 245
  • Open all receipts 412 364 119
  • Find a bill by customer 462 670 48

Android’s UiAutomator taps and looks at the screen every 30 ms, so a time can be late by one look, never early.

[04]Big shops

Year ten bills as fast as day one.

Saving a bill takes a fixed number of steps, so it stays flat as history piles up. The version before took 1.8–3.5 s for a 100-item bill on budget phones.

Save a 100-item billms
94 167 171

C53

74 75 111

Nord

25 30 48

S25

Each trio, left to right: 10,000, 100,000 and 300,000 bills.

What the screen waits forMilliseconds unless marked
10,125 100,248 300,371
C53NordS25C53NordS25C53NordS25
Home numbers 50 25 12 339 168 88 953 486 300
Save a 3-item bill 37 60 9 79 44 9 79 41 10
Save a 100-item bill 94 74 25 167 75 30 171 111 48
Find bills by customer 5 6 1 7 4 1 12 4 2
Credit list 48 30 15 351 186 88 1.0 s 537 343
Today’s report 65 60 16 397 204 87 1.1 s 560 366
1-year report 401 218 64 3.3 s 1.5 s 746 4.1 s 2.0 s 1.2 s
  • Under 0.1 s
  • Under 0.3 s
  • Under 1 s
  • 1 s or more

Home, credit and reports read every bill, so they grow with history: under a second everywhere up to 100,000 bills, except the yearly report.

[05]Start, scroll, print

Smooth from the first tap.

Opening after a crash
  • C53
  • Nord
  • S25

10,125

  • 1.6 s
  • 1.4 s
  • 449 ms

100,248

  • 2.7 s
  • 2.1 s
  • 701 ms

300,371

  • 5.2 s
  • 3.7 s
  • 1.3 s

The slowest start there is: after an unexpected stop, MOPX checks the whole database before Home. A normal start skips the check.

Frames on time while flinging

  • realme C53

    97.6% Stock
    100% Receipts

  • OnePlus Nord CE 3 Lite

    99.4% Stock
    100% Receipts

  • Samsung Galaxy S25

    95.9% Stock
    99.4% Receipts

Receipt to the printer

0.13–0.9s

58 and 80 mm, English and Hindi, from the request to the last byte.

See the receipts

App memory

124–182MB

At every shop size, even with 744 MB of records.

[06]Older phones

Quick on a 2019 phone, too.

A day earlier the same build ran on five more phones, down to a Galaxy A10 with 1.7 GB of memory. In the 300,000-bill shop, all eight saved a 100-item bill in under half a second.

Save a 100-item bill · 300,000 bills
  • Samsung Galaxy A10 2019 · 1.7 GB 311 ms
  • Samsung Galaxy A03s 2021 · 2.7 GB 420 ms
  • Samsung Galaxy A15 2023 · 5.5 GB 225 ms
  • realme C53 2023 · 5.6 GB 171 ms
  • OnePlus Nord CE 3 Lite 2023 · 7.2 GB 111 ms
  • Motorola moto g04 2024 · 3.7 GB 195 ms
  • Google Pixel 9 2024 · 11.3 GB 192 ms
  • Samsung Galaxy S25 2025 · 10.9 GB 48 ms

[07]Method

How it was measured.

  • Real phones

    Retail models in Firebase Test Lab, reset between tests, nothing else running.

  • The real app

    The release build with a test harness in front: same engine, same database settings as the Play build.

  • Real taps

    An Android test taps through the English screens like a person at the counter.

  • Checked

    Medians of repeated runs, and every data check agreed on every phone and shop size.

Every number belongs to the phone it was measured on. The shops are made up, so real shops will differ.

[08]Install

Ready when your next customer is.

  • Free
  • Android 7.0+
  • No account
Get it on Google Play

MOPX Free on Google Play

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