Comparison

eFatura vs Vector Strategy Engine

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

Head to head
About

eFatura

Manage your e-invoices conveniently on your mobile device. View, dispute, and correct invoices, track expenses, and access taxpayer information. An optional PRO version offers ad removal and advanced features.

Highlights
  • Invoice viewing and management
  • Batch invoice correction
  • Dispute and duplicate resolution
  • Expense statistics
  • Taxpayer information view
  • Dark mode support
Features
Read full description

With eFatura you can manage your e-fatura portal account. *** NOTE: Your tax information and credentials remain on your device and on the e-fatura servers. See the Privacy Policy for the usage and advertising data processed by third parties. *** eFatura is a mobile application that allows users to view and manage their invoices in a practical and simple way. In summary, eFatura features include: • Invoice viewing and management • Batch invoice correction • Dispute and duplicate resolution • Expense statistics • Merchant listing • Taxpayer information view with barcode and QR code • Dark mode support PRO version: • Ad removal • More detailed statistics • Invoice export to XLS • Multiple user support • Aggregated statistics across multiple users

About

Vector Strategy Engine

Features
Read full description

VECTOR STRATEGY ENGINE One decision a month. Five seconds to read it. VECTOR is a mathematical discipline engine for accumulating Bitcoin, Ethereum and Solana. It compares today's price against recent highs, classifies the market into four intensity regimes and tells you exactly how much of your monthly amount to invest — according to rules YOU set. No emotions, no FOMO, no panic selling. HOW IT WORKS • Four regimes — Base, Pulse, Reinforcement, Deep — derived from a dual 90/365-day anchor • A fixed monthly decision window (days 22–26) that turns investing into a ritual, not a reaction • Your allocation across BTC / ETH / SOL, fully configurable • Treasury and reserve rules so you never invest money you might need SELF-CUSTODY, ORGANIZED VECTOR counts your accumulation in blocks. When a block is complete, you store that cold wallet and open the next one. The app never touches your keys: no seeds, no PINs, no wallet locations — only the count of what you have already secured. SEE YOUR HORIZON Choose your own horizon (1 to 20 years) and watch four editable scenarios — including a negative one — recalculate with every purchase. Realistic projections you control, never promises. YOUR DATA IS YOURS Everything lives on your iPhone, protected by Face ID. An encrypted backup in your own iCloud survives reinstalls and phone upgrades. We collect nothing. No accounts, no tracking, no servers reading your history. WHAT VECTOR DOES NOT DO It does not buy or sell crypto. It does not connect to exchanges or wallets. It does not custody funds. It does not give financial advice. VECTOR is an instrument: the math decides, you execute — wherever you choose. One-time purchase. No subscriptions. No ads. Full user manual: vectorstrategy.app/manual-en.html

Screenshots

eFatura4 screens
Vector Strategy Engine4 screens

Verdict

The call

The clearest difference is ads: Vector Strategy Engine at none against eFatura's shown. Vector Strategy Engine also leads on update cadence (every 2 days vs every 2 weeks). eFatura's advantage is device support (3 vs 1). On price, in-app purchases and iOS requirement 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. eFatura sells 5 one-off in-app purchases and Vector Strategy Engine sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

eFatura ships an update every 2 weeks, Vector Strategy Engine every 2 days. The most recent releases landed on September 9, 2026 and September 17, 2026 respectively.

Scorecard3 real differences · 7 level
eFatura versus Vector Strategy Engine: the parameters behind the verdict, then further details
ParametereFaturaVector Strategy Engine
PriceFreeFree
Rating4.3 (16 ratings) — better—
Positive reviews12.5% of reviews—
Number of ratings16 — better—
Update frequencyEvery 2 weeksEvery 2 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15 — better16.0
Further details — not scored
Size17 MB3 MB
Age rating4+17+
DeveloperJorge MiguelEddy Medina Padron

In-app purchases

5 purchases

eFatura

One-time5
  • Buy me a beer$0.99
  • Pro version$2.99
  • Buy me a beer$2.99
Show 2 more
  • Buy me a beer$4.99
  • Buy me a beer$9.99
1 purchases

Vector Strategy Engine

One-time1
  • Unlock Vector$11.99

Questions

Is eFatura free?
eFatura is free to download, with in-app purchases available.
Is Vector Strategy Engine free?
Vector Strategy Engine is free to download, with in-app purchases available.
Do eFatura or Vector Strategy Engine have ads?
eFatura shows ads; Vector Strategy Engine does not.
Which is updated more often, eFatura or Vector Strategy Engine?
eFatura ships an update every 2 weeks, and Vector Strategy Engine every 2 days. Most recently, eFatura was updated on September 9, 2026 and Vector Strategy Engine on September 17, 2026.

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