Invoice Maker・Billing App vs Estimate Maker Flex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Invoice Maker・Billing App
Create and share professional invoices and estimates quickly from any device. Save time on paperwork, stay organized, and get paid faster with customizable branding and payment options. Focus on your business while this app handles your billing.
- Create invoices and estimates quickly
- Convert estimates to invoices
- Save product/service details
- Calculate taxes and discounts
- Add payment methods
- Customizable branding
- Add signatures and photos
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Over 5,500 users rated 5* for helping them create and share invoices in just a few seconds, on the go, from any device. Your time is too precious to spend on mundane paperwork. Let us handle that while you focus on what’s really important. FIVE REASONS TO GET STARTED NOW: 1. SAVE TIME Creating a professional invoice or estimate takes you just a few seconds and a couple of taps, as you save all details of your product or service —description, price and more. Convert estimates to invoices with one tap. 2. STAY ORGANIZED Never put off sending an invoice or estimate to your customer - you can easily create and share it before you leave the sight. Enter all the details you need, including tax or discounts - the app will do the math for you. Check simple and convenient reports in one glance to follow up on clients’ payments. 3. GET PAID FASTER Make it easy to get paid. Include your preferred payment methods description directly in your invoice - PayPal, bank account or cash - and enjoy getting paid in time. 4. LOOK PROFESSIONAL Impress your clients with crisp design and customized branding of your documents. Add signature, photos and notes to your invoices and quotes. INFO ABOUT USING THE APP AND REGARDING THE SUBSCRIPTION TERMS OF USE AND SUBSCRIPTION DETAILS You can create 1 free document, either invoice or estimate. After that, you can subscribe to the in-app to continue creating an unlimited number of invoices and estimates with a monthly subscription. You can cancel your subscription at any moment in your iTunes account settings, but refunds will not be provided for any unused portion of the terms. Payment will be charged to your iTunes Account at purchase confirmation. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. ------------ For support, email us support@saldoapps.com Terms of use: https://saldoapps.com/saldo-apps-terms-of-use Privacy policy: https://saldoapps.com/saldo-apps-privacy-policy by S/A Saldo Apps
Estimate Maker Flex
Create and send professional estimates quickly and easily. Convert estimates to invoices with a single tap. Customize titles, currencies, and date formats for a personalized touch. Works offline and supports multiple templates.
- Create and send estimates
- Convert estimates to invoices
- Customizable titles and subtitles
- Multi-currency support
- Multiple date formats
- Offline functionality
- Professional templates
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Create and send professional estimates on the spot. Turn estimates into invoices by a single tap. Close more business deals. How it works * Enter your info * Add customers manually or from Contacts * Add your products / services After that, you can create and send professional estimates instantly. Flexibility * Manually edit titles (e.g. Estimate -> estimación, Quote) * Manually edit subtitles (e.g. Billing address -> Bill to, Signature -> Approved by) * Multi-currencies (e.g. \$, £, ... Manually enter your currency code) * Date format (e.g. 04/18/2019, 18/04/2019, 18/Apr/2019) * Works without the internet * Import contacts from your existing contacts or manually create them * Payment term set up based on each customer (7 days by default) * Decimal hours or quantity supported * Five professionally designed beautiful templates * Delete items (e.g. Estimates, products, customers) by swiping to the left * Edit existing documents * Add signature and date on the spot * Icon, Signature, Note, Other comments fields won't appear if nothing is entered * Preview estimates before sending them as a PDF * Send as a PDF or print wirelessly * Create 5 estimates for free Professional Features * Add business registration name (ABN etc.) and number * Tax, GST, VAT set up (e.g. No tax, single tax, compound tax) * Add discount (Actual \$ or %) * Payment terms (Immediate, 7 days, 14 days, 21 days,... up to 180 days) * Add your company logo ### Mobility * Send directly from iPhone and iPad * Your personal estimate system in your pocket ### Upgrade to Subscription Version The subscription version offers cloud sync and backup features so that you can save all the info in our highly secured cloud services and share the same data across multiple iOS devices. Upgrading to the subscription version requires auto-renewal subscription. Payment will be charged to your Apple ID account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Links to Your Privacy Policy and Terms of Use: http://www.btoj.com.au/privacy.html http://www.btoj.com.au/terms.html Please feel free to contact us for anything. Simplify your life now.
Screenshots
Verdict
Invoice Maker・Billing App and Estimate Maker Flex both sit at 4.8 stars, but that hides the real split: 97% of Estimate Maker Flex's written reviews are positive against 56% of Invoice Maker・Billing App's. Estimate Maker Flex also leads on iOS requirement (13.0 vs 15.0). Invoice Maker・Billing App's advantage is ratings volume (7.2K vs 101) and chart position (#101 vs unranked). On price, rating, 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
Both are free to download. Invoice Maker・Billing App sells 12 in-app purchases, starting at $7.99 per month and Estimate Maker Flex sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for Invoice Maker・Billing App against 4.8 for Estimate Maker Flex. That said, the two scores are not equally well evidenced: Invoice Maker・Billing App has 7.2K ratings behind it against 101, so its average is the more settled of the two. Written reviews are what separate them: 56% of Invoice Maker・Billing App's written reviews are positive against 97% of Estimate Maker Flex's.
Invoice Maker・Billing App ships an update every 2 weeks, Estimate Maker Flex every 9 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | Invoice Maker・Billing App | Estimate Maker Flex |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (7.2K ratings) | 4.8 (101 ratings) |
| Positive reviews | 56.1% of reviews | 97.2% of reviews — better |
| Number of ratings | 7.2K — better | 101 |
| Update frequency | Every 2 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #101 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 301 MB | 99 MB |
| Age rating | 4+ | +4 |
| Developer | Saldo Apps Inc. | B TO J PTY LTD |
Customer experience
Invoice Maker・Billing App
Estimate Maker Flex
User reviews
Invoice Maker・Billing App
From 7.2K App Store ratingsWhat we love
- 👍 User-friendly layout
- 🚀 Fast and efficient
- 📝 Professional-looking invoices
- 💰 Convenient payment options
- 📊 Helpful reporting and tracking features
Room to improve
- 🐛 Occasional crashes and glitches
- 🔄 Issues with syncing and data loss
- 💰 Subscription model concerns
- 🕰️ Slow response times
- 🔒 Security and login problems
Estimate Maker Flex
From 101 App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Efficient for creating estimates
- 👍 Practical and functional
- 👍 Professional-looking estimates
- 👍 Helpful for business growth
Room to improve
- ❓ Translation not complete
- ❓ A little difficult to understand initially
- 🐛 App not opening
Bugs and requests
Invoice Maker・Billing App
Reported bugs
5 issues- Invoices not sending properly
- Subscription issues and unexpected charges
- Data loss after app updates or device changes
- Compatibility problems with newer iOS versions
- Invoices showing as drafts unexpectedly
Requested features
5 requests- Add late fee feature
- Improve invoice customization options
- Integrate with inventory management systems
- Provide better customer support channels
- Offer a one-time purchase option
Estimate Maker Flex
Reported bugs
1 issue- App not opening
Requested features
2 requests- Add option to get client signature
- Add signature of the person who made the estimate
In-app purchases
Invoice Maker・Billing App
- Monthly Premium Subscription$7.991 Month
- Weekly Premium Subscription$7.997 Days
- Weekly Premium Subscription3 Days trial$7.997 Days
Show 9 moreShow fewer
- Saldo Apps Premium3 Days trial$9.997 Days
- Saldo Apps Premium3 Days trial$11.997 Days
- Saldo Apps Premium3 Days trial$14.991 Month
- Invoice Maker PRO Monthly3 Days trial2 variants$14.991 Month
- Invoice Maker PRO Monthly2 variants$14.991 Month
- Monthly subscription$14.991 Month
- Monthly Premium Subscription$15.991 Month
- Annual Premium Subscription$49.991 Year
- Saldo Apps Premium Yearly3 Days trial$99.991 Year
Estimate Maker Flex
- 1 Month Subscription$5.991 Month
- 1 Year Subscription$49.991 Year
Questions
Is Invoice Maker・Billing App free?
Is Estimate Maker Flex free?
Which has better reviews, Invoice Maker・Billing App or Estimate Maker Flex?
Do Invoice Maker・Billing App or Estimate Maker Flex have ads?
Which is updated more often, Invoice Maker・Billing App or Estimate Maker Flex?
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