Comparison

Upkey 2 vs Trueline

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

Head to head
About

Upkey 2

Features
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Esta versión renovada de la aplicación permite a los hoteles integrar dispositivos BLE manteniendo los niveles de seguridad establecidos. El sistema admite tres perfiles de usuario diferenciados, lo que facilita su adaptación a las operaciones del establecimiento sin comprometer el control ni la trazabilidad. De forma predeterminada, las llaves electrónicas se generan y distribuyen desde el software de recepción. Para casos puntuales o situaciones de emergencia, el administrador de la instalación puede crear y enviar llaves de apertura vía Bluetooth desde su smartphone. Tras la ejecución de una auditoría, los registros se sincronizan automáticamente con el servidor y quedan disponibles tanto en el software de gestión como en la aplicación para los usuarios con perfil administrador.

About

Trueline

Features
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Trueline turns your iPhone into a level that behaves like a real instrument — quiet, readable, and honest about what it measures. Free: • Auto-switching modes — on edge or plumb you get a vial with a signed degree readout; laid flat it becomes a 2-axis bullseye surface level • Read in degrees, slope %, or roof pitch (rise per 12) • One-tap calibration • HOLD freezes a reading you can't see from where you're standing • ZERO for relative angles — the angle between two surfaces • Haptic snap and a green edge glow the moment you're level • Fully offline, no account Pro — one payment of $6.99, no subscription: • AR laser level: project gravity-true level and plumb lines onto the wall and hang a whole row of frames in one pass • Named angle presets — 4/12 and 6/12 roof pitch, stair rake, 2% drainage • Precision tolerance down to ±0.1° • 5 instrument themes • No ads Pay once, yours forever. No subscription, no sign-in, and nothing leaves your phone.

Screenshots

Upkey 23 screens
Trueline4 screens

Verdict

The call

The clearest difference is in-app purchases: Upkey 2 at none against Trueline's 1. Upkey 2 also leads on ads (none vs shown) and iOS requirement (15 vs 17.0). Trueline's advantage is update cadence (daily vs every 2 weeks). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Trueline sells 1 one-off in-app purchase. Upkey 2 asks for nothing beyond the download.

UpkeepUpdate frequency

Upkey 2 ships an update every 2 weeks, Trueline daily. The most recent releases landed on October 23, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 2 level
Upkey 2 versus Trueline: the parameters behind the verdict, then further details
ParameterUpkey 2Trueline
PriceFreeFree
Update frequencyEvery 2 weeksDaily — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15 — better17.0
Further details — not scored
Size75 MB12 MB
Age rating4+4+
DeveloperOmnitec Systems, S.L.Edge Analytics s.r.o.

In-app purchases

None

Upkey 2

No in-app purchases

1 purchases

Trueline

One-time1
  • Trueline Pro$6.99

Questions

Is Upkey 2 free?
Upkey 2 is free to download, with no in-app purchases.
Is Trueline free?
Trueline is free to download, with in-app purchases available.
Do Upkey 2 or Trueline have ads?
Trueline shows ads; Upkey 2 does not.
Which is updated more often, Upkey 2 or Trueline?
Upkey 2 ships an update every 2 weeks, and Trueline daily. Most recently, Upkey 2 was updated on October 23, 2026 and Trueline on October 3, 2026.

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