ePhoneGo2 vs Time Observation Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ePhoneGo2
This app allows employees to use their personal mobile devices for business calls, maintaining a single office number and voicemail. It ensures business calls display your office caller ID and provides access to corporate contacts, even when on the go.
- Receive office calls on mobile
- Make business calls with office caller ID
- Video calls with other users
- Corporate directory access
- Call transfer and recording
- Voicemail notifications
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To stay competitive, an organization’s high-performing employees need flexibility, to maximize their productivity without being tied to a desk. Plus, as a business, you must be able to maintain and protect sensitive company data while ensuring that your employees are fully accessible even while on the road. Employees often use personal devices for business transactions while on the road, which the company has no visibility of. These road warriors need a viable solution that gives them the ability to use their personal phones yet remain connected to the corporate communication system, enabling them to leverage business information with every call. In addition, businesses frequently lose components of the client interaction history when customers are contacted outside of their corporate phone system. Businesses need a solution that offers insight into all employee / client interactions, even those conducted while their employees were on the road. The solution is ESI ePhoneGO2™. Having the ePhoneGO2™ application on the iOS smartphone presents a user experience that mirrors the functionality of the ESI desktop phone, allowing employees who are “on-the-go” to make and receive business calls from anywhere using their personal devices, while still maintaining a single office phone number and voice mail. This also eliminates the need to publish anyone’s private mobile number to clients! Features – Receive calls on your Mobile device which were placed to your Office phone number – Make outgoing business calls remotely which appear to have been placed from your office – Calls made with ePhoneGO2™ will broadcast your office Caller ID, (not your personal phone number). – Establish one-to-one Video calls with other ePhoneGO2™ users. – Established voice-calls can also be upgraded to Video calls with other ePhoneGO2™ users. – View the Corporate directory with availability status of your contacts. – Create a list of frequently called users from the company directory or your phone’s personal contacts. – Established messaging sessions (SMS or IM). – Transfer calls (blind or supervised) as you would do from your desk. – Record calls from your mobile phone. – Turning Do-Not-Disturb ON or OFF for the mobile device. This allows you to pause alerting while you have your desk phone available). – Call routing options fully sync with your platform – Notification of new voicemail messages. – Make calls over WiFi or 3G / 4G / LTE / 5G, regular data rates apply IMPORTANT ESI ePhoneGO2™ for iOS requires an active account on the ESI Cloud PBX™ **Voice quality is highly dependent upon your WiFi or 3G / 4G / LTE / 5G network bandwidth** Warning for 3G / 4G / LTE Usage Some mobile carriers prohibit or restrict the use of VoIP calls over their networks and may interfere with, block, or institute fees for calls made over their 3G / 4G / LTE / 5G data networks. Check the terms of your cell phone agreement to determine the rules for your carrier. ESI cannot guarantee service and is not responsible for any charges or fees assessed in connection with usage of ESI ePhoneGO2™ on your mobile device. If you experience any issues please open a ticket via the ESI Support site at http://support.esi-estech.com or contact ESI Technical Support at 800-850-2151.
Time Observation Calculator
This app streamlines time studies for continuous improvement initiatives like Kaizen and SMED. It combines a stopwatch, data capture, and instant analysis to help optimize workflows and reduce waste. Ideal for professionals and students in industrial engineering and manufacturing.
- Built-in stopwatch for data capture
- Instant analysis of results
- Capture key data points and notes
- Streamlines time studies
- Optimizes workflow efficiency
- Supports Kaizen, SMED, and Gemba walks
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Tired of juggling a stopwatch, notepad, and calculator? There's a better way to do a time study. The Time Study App is an all-in-one solution for continuous improvement, putting a precise Time Observation Calculator right in your pocket. Designed for Kaizen, SMED, and Gemba walks, this app helps you: Capture data with an intuitive, built-in stopwatch. Instantly analyze results to make smarter decisions. Get precise data to improve efficiency and reduce waste. Stop manual time studies and start optimizing your workflow. Take control of your time and data to drive meaningful, lasting change. Designed for professionals and students of Lean and Kaizen, this app allows you to: Conduct accurate time studies with an intuitive, built-in stopwatch. Instantly calculate results for your SMED, Gemba, and continuous improvement events. Capture key data points, notes, and observations. Spend less time on manual calculations and more time on what matters—optimizing your workflow. Take control of your time and data to drive meaningful, lasting change. Perfect for industrial engineering, manufacturing, and anyone dedicated to continuous improvement.
Screenshots
Verdict
The clearest difference is review sentiment: Time Observation Calculator at 100% against ePhoneGo2's 35%. Time Observation Calculator also leads on rating (5.0 vs 4.3) and update cadence (every 3 weeks vs every 4 months). ePhoneGo2's advantage is price (Free vs $19.99) and ratings volume (1.5K vs 3). On ads, 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
ePhoneGo2 is free to download; Time Observation Calculator costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Time Observation Calculator holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: ePhoneGo2 has 1.5K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 35% of ePhoneGo2's written reviews are positive against 100% of Time Observation Calculator's.
ePhoneGo2 ships an update every 4 months, Time Observation Calculator every 3 weeks. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.
| Parameter | ePhoneGo2 | Time Observation Calculator |
|---|---|---|
| Price | Free — better | $19.99 |
| Rating | 4.3 (1.5K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 35.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.5K — better | 3 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 102 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Estech Systems, Inc. (ESI) | Aaron Davidson |
Customer experience
ePhoneGo2
Time Observation Calculator
Bugs and requests
ePhoneGo2
Reported bugs
3 issues- Text messages section disappeared
- Desktop version still does not properly work
- Dropped calls
Requested features
2 requests- Clearer instructions on how to receive calls after hours
- More reliable text notifications
Time Observation Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ePhoneGo2
No in-app purchases
Time Observation Calculator
No in-app purchases
Questions
Is ePhoneGo2 free?
Is Time Observation Calculator free?
Which has better reviews, ePhoneGo2 or Time Observation Calculator?
Do ePhoneGo2 or Time Observation Calculator have ads?
Which is updated more often, ePhoneGo2 or Time Observation Calculator?
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